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THE    HARKNESS-STACKPOLE    MEASURING    ENGINE 


p- 


DETERMINATION  OF  THE  SOLAR  PARALLAX 

FROM  PHOTOGRAPHS  OF  EROS 
MADE  WITH  THE  CROSSLEY  REFLECTOR 

OF 

THE  LICK  OBSERVATORY 
UNIVERSITY  OF  CALIFORNIA 


BY 
CHARLES  D.  PERRINE,  Astronomer  in  the  Lick  Observatory 

WITH    THE    ASSISTANCE   OF 

HAROLD  K.  PALMER,  Fellow  in  the  Lick  Observatory 
FREDRICA  C.  MOORE,  Assistant 
ADELAIDE  M.  HOBE,  Assistant 


WASHINGTON,   D.  C. 

PUBLISHKD   BY    THE   CarNEQIE   INSTITUTION   OF   WASHINGTON 

1910 


1^ 


i^l 


CAENEGIE  INSTITUTION  OF  WASHINGTON 
Publication  No.  119 


J.  8.  Cushing  Co.  —  Berwick  ft  Smith  Co. 
Norwood,  Mass.,  U.S.A. 


PREFACE 


A  few  days  following  the  untimely  death  of  Director  Keeler,  in  August, 
1900,  it  became  my  duty,  as  astronomer  in  charge,  to  make  provision  for 
carrying  out  the  requests  and  recommendations  of  the  Conference  Astro- 
graphique  Internationale  as  to  securing  cooperative  observations  of  Eros,  for 
the  determination  of  the  solar  parallax.  To  Assistant  Astronomer  Perrine  was 
assigned  the  securing  of  such  observations  as  could  be  advantageously  made 
with  the  Crossley  reflector.  Mr.  H.  K.  Palmer,  who  had  assisted  Professor 
Keeler  in  the  photography  of  nebulge  and  star  clusters,  and  who  was  therefore 
familiar  with  the  peculiarities  of  the  original  reflector  mounting,  was  asked 
to  assist  Dr.  Perrine.  The  observations  were  secured  in  great  numbers  on  all 
favorable  nights  throughout  the  advantageous  part  of  the  opposition,  as  pub- 
lished in  Lick  Observatory  Bulletin,  No.  13. 

There  remained  the  work  of  measuring,  reducing,  and  discussing  the  photo- 
graphic observations.  It  was  arranged  that  these  duties  should  be  undertaken 
by  another  observatory,  of  great  experience  in  dealing  with  photographic  star 
positions.  Unfortunately,  the  long-continued  illness  and  final  death  of  the 
director  of  the  observatory  delayed  the  utilization  of  the  Crossley  reflector  pho- 
tographs for  several  years.  The  plates  were  returned  to  Mount  Hamilton  in 
1905,  and  the  work  of  measurement  and  reduction  began  in  December,  1905,  on 
the  basis  of  a  grant  generously  made  by  the  Carnegie  Institution  of  Washington 
for  this  purpose.     This  aid  is  herewith  gratefully  acknowledged. 

The  plates  were  measured  and  the  more  routine  parts  of  the  calculation 
carried  through  by  Mrs.  Moore  and  Miss  Hobe,  as  explained  in  the  text,  under 
the  supervision  of  Dr.  Perrine.  The  critical  parts  of  the  reductions  and  the 
complete  discussion  of  the  results  were  made  by  Dr.  Perrine  personally.  A  de- 
tailed account  of  methods  and  formulae  employed  is  given  in  the  following  pages. 

W.  W.   CAMPBELL. 


Lick 
a© 

P4 


Ul 


TABLE  OF  CONTENTS 


PAQ« 

Pbeface iii 

Introdiiction 1 

General  plan  of  work 1 

Star-places  for  reduction  of  the  plates 1 

Selection  of  plates 2 

Measurement  of  the  plates 2 

Reduction           ...                 3 

Refraction 4 

Refraction  terms  of  the  second  order 4 

Spherical  corrections  and  corrections  for  refraction 4 

Aberration 4 

Parallax  corrections 5 

Formulae  used  in  the  reductions 5 

Reductions  to  true  place 8 

Corrections  to  the  Ephemeris  of  Eros 8 

Derivation  of  the  solar  parallax 10 

Systematic  errors         .............  10 

Weights 13 

The  final  value  of  the  solar  parallax 14 


TABLES 

I.   Meridian  plate  measures 16 

II.   Meridian  plate  constants 28 

III.   Meridian  mean  places,  reductions  to  apparent  place,  and  parallax  corrections     .  32 

IV.    Meridian  true  places  and  0-E 35 

V.    Parallax  plate  measures 38 

VI.   Parallax  plate  constants 67 

VII.   Parallax  mean  places,  reduction  to  apparent  place,  and  parallax  corrections       .  74 

VIII.    Parallax  true  places  and  0-E 80 

IX.    Star  positions  used  in  parallax  work 86 

X.    Selections  of  stars  used  in  reductions 88 

XI.   Derivations  of  corrections  to  assumed  parallax 89 

XII.    Positions  of  faint  stars  derived  from  Crossley  plates 92 

Appendix 95 

Description  of  the  Stackpole  Measuring  Engine 95 

Table  of  Scale  A  of  the  Staokpole  Measuring  Engine 97 

Table  of  Scale  B  of  the  Stackpole  Measuring  Engine         .  ....  98 


DETERMINATION  OF  THE  SOLAR  PARALLAX  FROM  PHOTOGRAPHS  OF 
EROS  MADE  WITH  THE  CROSSLEY  REFLECTOR  OF  THE  LICK  OBSERV- 
ATORY, UNIVERSITY  OF  CALIFORNIA. 


By  Charles  D.  Perrine. 


INTRODUCTION. 

Shortly  after  the  lamented  death  of  Director  Keeler,  I  was  asked  by  Director 
Campbell  to  take  charge  of  all  duties  in  connection  with  the  Crossley  reflecting  tele- 
scope. Before  any  great  amount  of  experience  had  been  gained  with  the  instrument 
I  was  under  the  necessity  of  making  out  a  program  for  observing  Eros  for  parallax. 
Fortunately,  we  still  had  the  services  of  Mr.  H.  K.  Palmer,  who  had  assisted  Professor 
Keeler  in  nearly  all  of  his  work  with  the  reflector.  His  experience,  enthusiasm,  and 
ability  throughout  the  trying  conditions  under  which  we  worked  on  the  Eros  campaign 
made  it  possible  to  secure  the  observational  material  which  was  obtained. 

The  instability  of  the  mounting  of  the  telescope,  which  had  given  Keeler  so  muph 
trouble  in  his  work  and  about  which  he  has  written  somewhat  fully  in  his  paper  on, the 
instrument,  was  the  chief  source  of  our  difficulties.  It  was  early  recognized  thatothe 
only  feasible  plan  was  to  give  exposures  as  short  as  would  furnish  sufficient  comparison- 
stars  within  the  region  of  good  definition  on  the  plates,  make  as  many  exposutes  as 
possible,  and  measure  only  the  perfect  images.  ,;(■ 

Observations  were  secured  on  every  possible  opportunity,  even  when  the  seeingwas 
poor  and  the  wind  high.  Round  images  were  more  desired  than  small  ones.  Avcfcm- 
plete  account  of  the  plates  and  of  the  conditions  under  which  they  were  taken  was 
printed  in  Lick  Observatory  Bulletin  No.  1 3,  and  it  seems  unnecessary  to  repeat  that 
account  here. 

All  of  the  measurements  and  reductions  of  the  Eros  plates  have  been  made  by  Mrs. 
Moore  and  Miss  Hobe,  Carnegie  Institution  of  Washington  assistants.  It  is  a  pleasure 
to  testify  to  their  ability  and  interest  through  the  entire  work. 

GENERAL    PLAN    OF   WORK. 

Owing  to  the  distance  of  Mount  Hamilton  from  the  other  observatories  taking  part 
in  the  Eros  solar  parallax  determination,  it  seemed  advisable  to  plan  so  that  the  obser- 
vations obtained  there  would  be  suitable  for  a  determination  of  the  parallax  by  them- 
selves, rather  than  in  combination  with  those  of  other  stations.  To  this  end  the  plan 
adopted  embraced  the  taking  of  photographs  at  large  hour-angles  both  east  and  west  of 
the  meridian.  In  addition  to  the  plates  for  displacements  of  Eros,  a  series  was  secured 
on  the  meridian,  for  the  determination  of  the  errors  of  the  ephemeris. 

STAR-PLACES   FOR   REDUCTION    OF   THE    PLATES. 

Within  the  small  fields  of  the  Crossley  plates  there  were  not  enough  catalogue  stars 
of  any  kind  to  furnish  a  basis  for  obtaining  positions  of  Eros  or  of  comparison-stars  near 
Eros.     It  therefore  became  necessary  to  have  recourse  to  star-places  obtained  from  the 
B  1 


2  DETERMINATION   OF   THE   SOLAR   PARALLAX 

plates  taken  with  the  astrographic  telescopes,  which  had  much  larger  fields  and  for  the 
reduction  of  which  an  especially  planned  list  of  stars  was  observed  with  meridian 
circles.  In  the  preliminary  investigations  upon  some  of  the  Crossley  plates  it  was 
necessary  to  have  the  places  of  sufficient  stars  for  their  reduction.  On  making  a 
request  to  Director  Loewy,  the  Paris  Observatory  measured  and  furnished  the  places 
of  a  list  of  stars  for  the  purpose. 

In  his  work  of  discussing  star-places,  Professor  Hinks,  of  the  Cambridge  Observatory, 
kindly  offered  to  include  the  stars  required  for  the  proper  reduction  of  the  Crossley 
plates.  The  Royal  Observatory  at  Greenwich  specially  measured  and  reduced  nearly 
lOO  star-positions  for  use  by  Professor  Hinks  in  his  list  for  the  Crossley  plates.  Need- 
less to  say,  these  star-places  were  an  essential  feature  of  our  work,  and  our  indebtedness 
to  these  sources  is  proportionately  great. 

In  the  reduction  of  the  meridian  plates,  after  the  plate  constants  had  been  derived, 
the  positions  of  all  the  comparison-stars  were  computed  from  the  plate  measures.  These 
places  were  compared  with  the  catalogue  places  and  in  a  few  cases  where  the  discord- 
ances were  large  and  the  weights  of  the  catalogue  places  small,  the  Crossley  places  were 
adopted  for  the  parallax  solution. 

''  SELECTION    OF   PLATES. 

For  the  determination  of  the  absolute  places  of  Eros,  3  of  the  best  plates  on  each  of 
44;'nights,  or  129  plates  in  all,  taken  close  to  the  meridian,  were  selected.  These 
th#ee  plates  contain,  on  the  average,  ten  images,  which  should  furnish  a  strong 
plice  of  the  asteroid.  Only  those  images  were  measured  which  appeared  to  be  per- 
fectly round.  Star-places  for  some  of  the  dates  at  the  beginning  of  the  meridian  series 
and  also  at  the  end  were  difficult  to  obtain.  As  they  were  not  necessary  in  the  parallax 
work,  these  dates  were  dropped. 

"!l©3r  the  parallax  work,  only  those  dates  were  selected  which  contained  both  east- 
andswest  observations  on  the  same  night.  It  was  necessary  to  discard  five  of  these 
because  of  poor  images.  These  restrictions  necessarily  reduced  the  amount  of  material, 
but  in  such  cases  only  the  good  observations  really  justify  measurement  and  reduction, 
and  I  believed  that  the  result  from  carefully  selected  data  would  be  stronger  than  if  a 
considerable  number  of  poor  plates  were  included.  Observations  for  which  the  parallax 
factors  would  be  small  were  excluded  for  the  same  reason.  The  results  obtained  in  the 
following  discussion  are  based  upon  281  plates  on  18  nights;  823  selected  images  of 
Eros  were  measured. 

MEASUREMENT   OF   THE    PLATES. 

All  of  the  plates  have  been  measured  on  the  Harkness-Stackpole  Engine  belonging 
to  the  Lick  Observatory.  A  very  brief  description  of  this  engine  is  given  in  PubUca- 
tions  of  the  Lick  Observatory,  vol.  i,  p.  ^6.  A  more  detailed  account  is  desirable  and 
is  appended.  A  considerable  amount  of  preliminary  investigation  of  the  engine  was 
carried  out  before  any  of  the  final  measurements  were  made.  The  slides  were  tested 
and  found  to  be  sensibly  straight.  Micrometers  were  attached  to  the  microscopes  for 
reading  the  glass  scales  more  accurately.  A  number  of  plates  were  measured  in  this 
way.  It  was  soon  found,  however,  that  there  were  errors  in  the  positions  of  the  star- 
images  themselves  larger  than  the  errors  of  the  scale  divisions  and  of  reading  the  scales 
by  the  glass-reticle  microscopes.  When  several  settings  were  taken  and  plates  measured 
in  direct  and  reversed  positions,  it  was  found  that  such  errors  were  sufficiently  reduced 


INTRODUCTION  3 

to  bring  them  well  below  the  errors  of  the  images  themselves.  The  scale-micrometers, 
were,  therefore,  discontinued.  All  measures  were  referred  directly  to  the  glass  scales, 
without  the  intervention  of  a  reseau. 

The  sky  had  previously  been  used  as  a  source  of  illumination  for  the  negative  and 
the  scales.  Considerable  difficulty  was  experienced  from  changes  of  intensity  on  cloudy 
days  and  late  in  the  afternoons  of  clear  days.  Experimental  plates  were  measured, 
using  Rochester  kerosene  lamps,  the  sky  light  being  screened  off.  The  resulting  meas- 
ures showed  no  indication  of  any  systematic  effect  and  the  method  was  adopted  for  the 
Eros  plates.     All  of  them  have  been  measured  under  these  conditions. 

The  general  stability  of  the  engine  had  been  found  to  be  good.  The  error  of  runs 
of  the  scale  microscopes  was  very  carefully  adjusted  to  zero  before  beginning  the  work. 
This  adjustment  was  tested  frequently  throughout  the  measuring,  but  required  no 
change.  The  measurements  of  all  plates  were  completed  the  same  day  on  which  they 
were  begun. 

The  plates  were  measured  in  each  of  two  positions,  i8o°  apart.  Three  settings 
were  made  on  Eros,  then  two  settings  on  each  of  the  comparison-stars  in  turn,  then 
three  more  on  Eros.  This  was  the  program  for  each  of  the  sets  of  exposures  selected. 
A  complete  measure  rests  upon  12  settings  on  Eros  and  4  settings  on  each  star.  Set- 
tings were  recorded  to  o.oooi  inch  and  the  means  taken  to  o.ooooi  inch.  Before  the 
measured  plate  was  removed  from  the  engine,  the  differences  were  taken,  the  direct  and 
reversed  coordinates  compared,  and  any  discrepancies  looked  up. 

The  inclination  of  the  slides  was  carefully  determined  on  a  number  of  days.  The 
value  of  the  angle  between  the  \e^  end  of  the  ^-slide  and  the  farther  end  of  the  F- slide 
was  found  to  be  89°  48'  30".  The  form  of  the  correction  for  inclination  to  be  applied 
to  the  vV-coordinates  is,  therefore,  -f  Y  sin  /,  where  /  is  the  deviation  of  the  F-slide 
from  the  true  F-axis. 

The  F-co6rdinates  theoretically  require  the  small  corrections  introduced  by  the 
term  cos/.  The  coordinates  are  all  less  than  1000",  for  which  the  correction  is  neg- 
ligible. No  plates  or  images  have  been  rejected  since  the  completion  of  the  measures. 
During  the  work  of  measurement,  a  number  of  rejections  of  stars,  images,  and  plates 
were  made,  when  it  was  found  that  they  were  so  bad  as  to  weaken  the  result. 


REDUCTION. 

As  the  method  of  using  photography  for  determinations  of  the  highest  precision  is 
still  in  its  infancy  and  can  not  be  said  to  be  on  the  same  well-defined  footing  as  the 
visual  methods,  and  because  there  is  a  distrust  of  photographic  results  by  some  astrono- 
mers, it  seemed  desirable  to  take  unusual  precautions  against  peculiar  errors  in  this 
work.  To  this  end  a  plan  of  reduction  was  adopted  which  promised  detection  of  errors 
peculiar  to  photographic  methods,  should  they  exist. 

As  the  apparent  motion  of  the  asteroid  between  evening  and  the  following  morning 
observations  was  only  about  8'  to  10',  it  was  possible  to  select  the  comparison-stars  so 
that  they  would  fulfill  two  conditions  : 

(i)  The  same  stars  would  be  used  for  both  evening  and  morning  reductions,  thus 
eliminating  to  a  great  extent  any  errors  of  the  star-places  themselves.  Such  a  selection 
of  stars  also  permitted  an  investigation  of  the  refractions  and  any  possible  distortion  of 
the  mirrors. 

This  procedure  had  the  objection  that  if  there  were  any  optical  distortion  it  would 
remain  in  part  because  the  asteroid  was  eccentrically  placed  among  the  stars,  in  opposite 


4  DETERMINATION   OF   THE   SOLAR   PARALLAX 

directions  at  the  two  elongations.  To  test  this  point,  a  different  selection  was  adopted, 
so  that  — 

(2)  The  stars  would  be  as  symmetrically  placed  about  the  asteroid  as  possible.  This 
selection  also  had  the  advantage  of  reducing  any  effect  on  the  scale  value  and  orienta- 
tion due  to  errors  in  the  places  of  the  comparison-stars. 

The  two  different  methods  furnished  in  addition  a  valuable  check  on  the  numerical 
work.  The  measures  of  the  images  selected  on  each  plate  were  combined  and  reduced 
as  a  whole.  By  using  the  center  of  gravity  of  the  comparison-stars,  as  origin,  it  became 
possible  to  simplify  the  reduction  of  the  individual  plates.  Instead  of  reducing  each 
plate  directly  to  the  system  of  stars,  a  system  of  standard  rectangular  coordinates  was 
first  derived  from  all  of  the  plates  of  a  group  (evening  or  morning)  by  taking  their 
means  after  having  corrected  for  refraction.  The  scale  value  and  orientation  correc- 
tions necessary  to  reduce  each  plate  to  the  standard  were  then  easily  obtained,  in  rec- 
tangular coordinates.  The  constants  necessary  to  reduce  the  standard  coordinates  to 
the  star  system  were  then  obtained  and  the  data  necessary  for  the  complete  reduction 
of  the  group  of  plates  were  available.  This  plan  was  followed  in  all  except  a  very  few 
cases  where  it  was  necessary  to  reduce  one  or  two  plates  directly  to  the  star  system  on 
account  of  a  change  in  the  position  of  the  optical  axis. 

The  same  plan  of  reduction  was  used  for  the  meridian  observations. 

REFRACTION. 

The  ranges  of  temperature  and  air-pressure  were  both  small  during  the  observations, 
and  it  was  found,  upon  investigation,  that  a  constant  value  of  each  could  be  used  in  com- 
puting the  refraction  corrections,  without  introducing  any  appreciable  error  into  the 
final  result.  The  refractions  were  therefore  computed  for  a  temperature  of  -1-55°  F. 
and  an  air-pressure  of  26.00  inches. 

REFRACTION  TERMS  OF  THE  SECOND  ORDER. 

According  to  the  criterion  developed  by  Rambaut,*  the  refraction  terms  of  the  sec- 
ond order  for  a  zenith  distance  of  60°  do  not  amount  to  o'.'oi  until  the  Aa  or  AS  exceeds 
950".  As  the  greatest  distances  measured  on  the  Eros  plates  are  under  this,  and  as  the 
reductions  are  made  to  two  decimal  places,  it  is  not  necessary  to  consider  refraction 
terms  beyond  the  first  order. 

SPHERICAL  CORRECTIONS  AND  CORRECTIONS  FOR  REFRACTION. 

As  it  was  desired  to  compare  the  east-and-west  plate-measures  as  early  as  possible  in 
the  process  of  reduction,  with  the  view  of  detecting  optical  distortions,  etc.,  the  refrac- 
tion corrections  were  applied  in  the  rectangular  form  as  given  by  Turner.  The  spher- 
ical corrections  were  computed  by  Jacoby's  expansions,  but  on  account  of  the  above 
method  of  correcting  for  refraction,  it  was  necessary  to  use  the  apparent  center  of  the 
plate,  as  origin,  instead  of  the  true  center,  in  applying  the  spherical  corrections. 

ABERRATION. 

An  investigation  has  shown  that  the  maximum  effect  of  differential  diurnal  aberra- 
tion which  can  occur  under  the  conditions  of  the  Eros  parallax  work,  in  the  limited  field 
of  the  Crossley  reflector,  is  so  small,  when  a  number  of  stars  are  used,  as  to  be  insen- 
sible. Furthermore,  any  residuals  of  this  kind  become  of  an  accidental  order  and  are 
entirely  eliminated  in  a  series  of  sufficient  length. 

*  Astr.  Nach.,  3125,  c.  65. 


INTRODUCTION  5 

PARALLAX    CORRECTIONS. 

The  parallax  corrections  were  computed  with  the  value  8'.'8o;  the  value  of  log  p 
used  was  9.99954SS,  which  is  the  value  for  the  Crossley  reflector  including  the  altitude 
of  the  instrument  above  sea  level. 

FORMULAE   USED    IN    THE    REDUCTIONS. 

For  convenience  of  reference  the  various  formulae  used  in  the  investigation  are  here 
collected. 

The  formulae  for  parallax  take  the  well-known  form : 

,     8.800  cos  <i>'  sin  i"  $      j,      8.800/       .    j        j.i        ^,         s  •    j/\ 

a  —  a'  = '-- ^- =  TT  d  —  6  =  — -J-(  —  sm  o  cos  <p  cos  /+ cos  o  sin  ©' ) 

A  cos  o  A 

where  log  p  =  9-9995455  and  the  parallax  factor  =15  cos  B 


8.80 
The  refraction  terms  (for  each  star)  are  as  follows : 

M^  =  k'{i  +  H^)smi"  N,  =  M^  =  k'  -G-H sin  i"  N^  =  k'{i  +  CP)smi" 

where 

tan  iV  =  cot  (^  cos  /  6^  =  cot(8  +  iV) 

//=  cosec  (S  +  iV)  tan  t  sin  N  k'  =  (photo- visual)  a' B^'f'  (Bessel's  tables) 

The  rectangular  coordinates,  X^  and  F^,  of  each  comparison-star  as  referred  to  Eros 
are  measured  and  the  corrected  values  ^  and  F  found  by 

X=X,+  Fosin/-|-7l/^„-l-iV^Fo  F=  Y^  +  M^X^  +  NyY^ 

where  /  is  the  angle  of  inclination  of  the  slides  of  the  measuring  engine. 

From  the  values  of  X  and  F  thus  secured  the  coordinates  of  the  center  of  gravity  of 
the  group  of  comparison-stars  are  determined  for  each  plate  by : 

/-•  _.  Xg  +  Xf,  ■   ■   •  X„  3^  —  ^a'^  ^1,  ■   ■   ■   Y„ 

V  V 

where  v  =  number  of  comparison-stars. 

With  these  values  of  C  and  K  new  coordinates  for  the  comparison-stars  from  the 
center  of  gravity  were  found  for  each  star  as  follows : 

Xg-C  =  X\,  ■  ■  ■  X„-C  =  X'„  Y,-K=Y\,  .  .  .    Y„-K=Y', 

For  all  "  east "  plates  and  for  all  "  west "  plates  on  a  particular  date  these  new 
coordinates  were  combined  in  a  "  standard  "  plate  by 

X'a.  +  ^'a,+     ■    ■    ■    ^'«„        y  Y'.,+   Y'a,+     '    •    '     Y' a„        ^ 

n  n 

(for  comparison-star  a) 

and  similarly  for  each  comparison-star  "  east "  or  "  west,"  giving  a  fictitious  plate  of 
stars  whose  coordinates  are  the  means  of  those  stars  for  the  Individual  plates. 

The  polar  coordinates  of  the  stars  (as  furnished  by  Hinks)  are  reduced  to  the  center 
of  gravity  of  the  system  in  the  following  manner:  the  mean  of  the  "east"  ^  and  F 
coordinates  of  some  star  near  Eros  are  converted  into  a  and  S  by 

AS  =  jj  F,  and  Aa  =  f  — "  j  x  sec  Sk™ 
whence  ^'5/ 

^Er08=  S8lar  + AS,    and  «Ero8  =  "star  +  A« 


6  DETERMINATION   OF   THE   SOLAR   PARALLAX 

In  the  above,  Sa  and  s^  are  the  values  of  scale  A  and  scale  B  respectively.  From 
these  values  the  apparent  a  and  B  of  Eros  were  obtained  by 

A«'  =  _  ^ k'  cosec (8  +  N) cot  A^sec  S^  AS'  =  - k' cot(B +Ar) 

and 

«app.  =  'J:(-^«'  Kpp.  =  ^l-^B' 

If  there  is  any  appreciable  spherical  correction  due  to  the  chosen  star  not  being  close 
enough  to  Eros  that  also  is  applied. 

Having  the  apparent  «  and  S  of  Eros,  the  differences  A«  and  AS  between  Eros  and 
the  individual  stars  are  derived;  with  these  values  the  curvature  corrections  lA"^a> 
[Z>"]a,  etc.,  are  taken  from  tables  computed  in  accordance  with  the  formulae  given 
in  the  Lick  Observatory  Bulletin  4,  78  (1906);  these  are  applied  to  the  individual  stars 
giving  places  freed  from  curvature. 

[^"]a,  [Z?"]o,  etc.,  are  the  sums  of  all  of  the  sensible  terms  of  the  curvature  correc- 
tions, computed  by  the  following  formulae  : 
For  X  sec  S 

Ai"  =  ^1  (X  sec  8)  y  Ai"  =  A^  (X  sec  8)  K=  A,"  =  Ai  (X  sec  8)» 

Ai"  =  At  (X  sec  8)8  y  A,"  =  A,  {X  sec  8)  K»  A^"  =  A^  (X  sec  8)»  y 

Aj"  =  A^  {X  sec  8)'  ^g"  =  A^  {X  sec  8)  K < 

For  Y 

Di"  =  Di  {X  sec  8)''  A"  =  A(^  sec  hy  K  A"  =  D3  K» 

Dt"  =  Di{Xscchyy  D,"  =  D,  (X  sec  Sy  D^"  =  D^  (X  sec  8)*  y 

D."  =  Dj  (X  stc  sy  yo  D^'^D^y- 

The  auxiliary  quantities  A^,  etc.,  Z^i,  etc.,  are  computed  by  the  following  formulae: 

^x  =  sin  I"  ten  8  [4-68557-10]  i?i  =- Ki5)''sini"  sinz  8  [„6.4357o  -  lo] 

^j  =  sin''i"ten«8  [9.37115-20]  /?,  =  -  i(l5)=sm2 1"  [„i.4223o  -  10] 

As  =  -  J(i5)'^sin2  i"  [„i.2462i  -  10]  A  =  -  ^sin^  i"  [„8.89403  -  20] 

^^=-(15)3  sin' I"  tan  8  [„6.4o890  -  20]  A  =  -  i(i5)2sin»  i"  sin2  8tan  8  [06.10787-20] 

/<5  =  sin' I"  tan' 8  [4.05672-20]  A  =      j(i5)*sin' i"  (3sin  8  cos'S 

y4,  =  - 2(is)2sin*i"tan2  8  [n  1-3955 '- 20]  +sin'Scos8)  [7.85799-20] 

Aj  =  \{l^ysvB*'l"  [2.74769-20]  A=      \{i^ys\n*i"  [3.02069-20] 

/«g  =  sin*i"tan*8  [8.74230-30]  A=     KiS)^sin* '"  (' -  tan^S)  [0.79345-20] 

Z?,=      isin^i"  [8.04333-30] 

The  logarithms  of  the  constant  quantities  are  given  in  brackets. 
The  corrected  star-places  are  now  reduced  to  the  center  of  gravity  separately  for 
"  east "  and  "  west "  by 

_«„  +  «;,+    •   •   •  «„  s  _K  +  h+    •  •  •  K 

Ct-.  — ^k 

V  V 

and,  for  each  star, 

«o  -  «c  = -*"  sec  S  8„-Si  =  ^ 

The  rectangular  coordinates  of  the  "  standard  "  plates  are  next  converted  into  polar 
coordinates  by  means  of  the  adopted  values  for  scale  A  and  scale  B;  then  a  com- 
parison is  made  of  these  plate  coordinates  with  the  star  coordinates : 

«^  =  ^a,—  sec  S,  —  j:  sec  S  w^  =  F„,  •  jj  — / 


Using  the  values 

«^  =  (Xa^  -  ^  sec  S  -  4r  sec  S  j  1 5  cos  S  riy  =  Y,„  -  s^  -y 


tr  =  Xa,  -^  sec  S  -  15  cos  S  p  =  K,  ■  -f* 


INTRODUCTION  7 

the  equations 

irp  +  pr+n'^  =  o  pp-7rr+n„=o 

are  formed,  where  p  and  r  are  the  corrections  to  be  found  to  the  adopted  values  of  the 
scale  and  the  orientation. 
Letting 
^=[,r7r]  £=[K]  C=[7r«;]  C  =  lpn,]  i?  =  [p/a]  ^' =  -  [tt^J 

the  corrections  to  scale  value  and  orientation  are  derived  for  the  "  standard  "  plate, 

C-C  E  +  E' 


A  =  -T-r77  ^  = 


A+n  '         A+D 

Next  are  derived  the  values  /'  and  r'  of  the  individual  plates  reduced  to  the  "  stand- 
ard ";  this  is  done  precisely  as  above,  except  that  there  is  no  reduction  to  polar  coor- 
dinates, giving 

fix  ^  -Opiate  —  -^Btandard  ''v  ^^   M)l»te         •''•tendard  """Pp  T  pfp  +  nj.=  O,  CtC. 

and  for  any  plate 

P=A+/>p  r=r,  +  rp 

Applying  these  corrections  to  the  center  of  gravity  coordinates  (transformed  to 
polar)  in  the  following  form 

C+pC+^  rKsQC  B  =  A«Ero.  K  +  1$  rCcosB\+/>K=  AS^„, 

gives  the  desired  right  ascension  and  declination  of  Eros : 

A  a  -1-  «center  of  gravity  ^  *EroB  ^"  T  ^center  of  gravity  ^  °Ero« 

This  is  done  independently  for  "  east  "  and  "  west "  plates.  These  coordinates  must  be 
reduced  to  apparent  place  to  compare  with  the  computed  value.  To  make  the  a  com- 
parable the  equations 

«Ero8  -I-  Aa'  -t-  TT 

are  formed  for  each  plate,  where  A«'  is  composed  of  A«  from  Circulaire  9,  p.  191,  and 
^  k'  =  r^  sec  8  sm{I/+  a)h  (that  part  of  the  regular  apparent  place  reduction  omitted 
from  Aa). 

For  each  plate  a  value  of  a  is  interpolated  from  Millosevich's  ephemeris.  This  is 
corrected  by  terms  due  to  the  obliquity  of  the  ecliptic  and  perturbations.  For  the 
"  west "  plates  an  additional  correction  is  applied,  due  to  the  fact  that  the  meridian 
plates  afford  a  correction  to  Millosevich's  ephemeris,  and  is  obtained  by  multiplying 
the  intervals  between  "east"  and  "west"  plates  by  the  correction  to  the  ephemeris 
over  those  periods.     Thus  we  derive  for  the  a  ephemeris 

«epiiemeri.  =  «Miiio8evich  +  (interval  X  correction  to  ephemeris) 

+  (obliquity  correction) -f- (perturbation  correction) 

A  comparison  of  these  values  with  the  observations  gives  a  series  of  values  of  Obs.- 
Eph.  for  "east"  and  "west"  plates  on  each  date.  The  "east"  and  "west"  values  are 
now  combined  and  multiplied  by  the  parallax  factor,  giving 

{E-  Pr)"i5cosa_^^^ 

where 

E  and  W=  differences  Obs.-Eph.  in  seconds  of  arc. 

297/=  sum  of  parallax  factors  for  the  plates  combined. 
Attq  =  the  correction  to  the  value  8.80". 


8  DETERMINATION  OF  THE  SOLAR  PARALLAX 

From  the  extensive  literature  relating  to  formulae  and  methods  used  in  reducing 
photographic  plates,  the  following  titles,  in  addition  to  those  quoted  in  the  text,  are 
given  as  bearing  most  closely  upon  the  present  research : 

H.  H.  Turner.     Preliminary  note  on  the  reduction  of  measures  of  photographic  plates.     Monthly  Notices, 

54,  II. 
H.  Jacoby.     Comparison  of  methods  for  the  reduction  of  star-photographs.     Astronomical  Journal,  22,  8l. 
On  the  reduction  of  stellar  photographs,  with  special  reference  to  the  astro-photographic  chart  plates. 

Columbia  Observatory  Contributions,  No.  lo. 

Tables  for  the  reduction  of  astronomical  photographs.     Columbia  Observatory  Contributions,  No.  23. 

C.  D.  Perrine.     How  to  obtain  the  position  of  a  star  from  a  photograph.     Popular  Astronomy,  15,  259. 
Preliminary  note  on  some  simplifications  in  the  reduction  of  stellar  photographs.     Lick  Observatory 

Bulletin,  4,  77  and  99. 

REDUCTIONS   TO   TRUE    PLACE. 

In  the  reductions  to  true  place  the  aberrations  were  computed  with  data  derived 
from  the  American  Ephemeris  for  1900,  the  precessions  and  nutations  being  taken  from 
Circular  No.  9  of  the  "  Conference  Astrophotographique  Internationale  de  Juillet,  1900." 

To  render  the  observations  and  ephemeris  homogeneous,  the  reductions  to  Newcomb's 
value  of  the  obliquity,  as  published  by  Witt  in  Circular  12  of  the  "Conference  Astro- 
photographique Internationale  de  Juillet,  1900,"  have  been  applied. 


CORRECTIONS   TO   THE    EPHEMERIS   OF   EROS. 

The  deviations  of  Eros  from  the  ephemeris  in  Circular  No.  9  of  the  "  Conference 
Astrophotographique  Internationale  de  Juillet,  1900,"  were  derived  from  the  observa- 
tions made  near  the  meridian.  Each  final  position  used  is  the  mean  of  from  ten  to 
twelve  images. 

An  inspection  of  the  charted  residuals  in  right  ascension  showed  some  evidence  of 
a  periodic  inequality.     The  residuals  of  the  intervals 

Oct.  5  to  10,  inclusive        Nov.  9  to  13,  inclusive        Nov.  23  to  Dec.  12,  inclusive 

can  be  represented  much  better  by  a  curve  whose  double  amplitude  is  o".o5  and  period 
about  9  days  than  by  a  straight  line.  The  accompanying  reproduction  of  the  chart  will 
make  this  clear. 

It  should  be  noticed,  however,  that  the  interval  from  Oct.  12  to  Nov.  5  inclusive, 
over  which  observations  are  fairly  well  distributed,  does  not  show  any  periodicity  of  this 
kind.  In  fact,  these  residuals  are  satisfactorily  represented  by  a  straight  line.  The 
first  possibility  examined  in  search  for  an  explanation  was  that  of  a  connection  with  the 
light  period  of  2"  38°"  found  by  Oppolzer.  82  periods  of  2"  38"  very  nearly  equal  9 
days,  hence  the  relation  might  be  to  the  shorter  period,  where  daily  observations  only 
are  used.  Comparison  over  the  entire  period  of  79  days  covered  by  the  observations 
showed  a  lack  of  synchronism.  Comparison  was  then  made  with  the  period  of  2"  38'", 
using  a  separate  epoch  for  each  group.  This  comparison  showed  strong  evidence  of 
some  relation  to  a  period  of  about  that  length.  The  accompanying  diagrams  will  make 
plain  the  apparent  connection. 

It  seemed  very  desirable,  if  not  absolutely  essential,  that  the  light  variations  of  Eros 
during  the  period  covered  by  these  observations  should  be  utilized  in  this  connection. 


INTRODUCTION  9 

before  making  further  attempt  to  locate  the  cause  of  an  apparent  connection  with  a 
period  approximating  closely  to  that  of  the  brightness  variation.  Efforts  have  been 
made  to  secure  the  unpublished  photometric  observations  of  Eros  made  in  1900  at  other 
observatories,  but  they  are  not  yet  available. 

A  careful  examination  was  made  to  see  if  there  was  any  relation  to  the  Moon.  While 
the  three  maxima  observed  fall  pretty  close  to  maxima  of  the  nutation  term,  the  length 
of  the  Eros  period  appears  to  be  9  days  instead  of  14,  as  in  the  nutation.  This  length 
of  period  seems  pretty  well  established  from  the  interval  Nov.  23  to  Dec.  12,  where  two 
complete  periods  are  well  outlined.  There  does  not  appear  to  be  any  indication  in  these 
observations  of  an  error  in  the  assumed  mass  of  the  Moon. 

It  seems  very  unlikely  that  there  should  be  any  relation  to  the  very  small  term  in 
which  3  c  appears. 

On  the  whole,  it  appears  more  probable  that  the  inequality  is  connected  with  the 
variation  of  light  in  some  way.  This  explanation  has  grave  difficulties  also,  for  the 
asteroid  presented  no  sensible  disk  and  the  most  ready  explanation  would  be  one  of 
varying  surface  brightness. 

Failing  to  find  a  satisfactory  explanation,  the  reality  of  the  periodic  inequality  may 
be  questioned,  although  appearances  certainly  favor  its  genuineness,  particularly  in  the 
first  and  last  intervals.  It  is  difficult  to  see  how  so  many  observations  can  be  so  well 
represented  by  a  curve,  simply  on  the  doctrine  of  chance,  to  say  nothing  of  the  probable 
accuracy  being  greater  than  would  be  shown  by  the  residuals  on  the  assumption  of  a 
straight  line. 

The  declination  residuals  were  then  plotted  to  see  if  they  would  throw  any  light  on 
the  matter.  The  residuals  in  the  first  interval  from  Oct.  5  to  10  require  a  curve  similar 
to  that  found  for  the  right  ascensions  of  the  same  interval,  to  represent  them.  There 
are  also  some  evidences  of  a  similar  periodicity  throughout  the  other  two  intervals, 
although  not  nearly  so  well  marked  as  in  the  right  ascensions. 

Comparison  was  also  made  with  all  of  the  available  residuals  pubHshed  by  other 
photographic  observers  of  Eros,  which  showed  that  the  Crossley  residuals  all  fall  inside 
the  belt  formed  by  such  observations.  The  total  of  the  observations  fails  to  disclose  any 
such  periodicity.  Various  other  possible  sources  were  considered,  such  as  the  plate- 
constants,  refraction,  displacements  in  a  secondary  orbit,  etc.,  but  no  reasonable  expla- 
nation has  been  found.  A  similar  systematic  error  in  the  star-places  would  be  carried 
through  the  work,  but  that  seems  impossible.  In  view  of  these  facts,  the  deviations 
have  been  treated  as  accidental,  for  the  present,  in  deriving  the  corrections  to  the 
ephemeris. 

The  daily  variations  found  in  the  ephemeris  right  ascensions  during  three  intervals, 
covering  our  parallax  dates,  are  : 

Oct.  6  to  29  inclusive —.0071 

Nov.  3,  10 0000 

Nov.  28  to  Dec.  24  inclusive +  .0041 

These  values  were  used  in  our  parallax  derivations.  An  examination  of  the  parallax 
dates,  with  respect  to  the  possible  effect  of  any  such  periodic  inequality  in  the  motion  of 
Eros  if  of  9-day  period,  shows  that  the  observations  are  so  numerous  and  so  distributed 
that  but  little  effect  can  enter,  even  if  such  a  periodic  inequality  is  real.  If  the  con- 
nection should  be  with  the  short  light  period,  it  is  also  probable  that  the  observations  are 
numerous  enough  to  eliminate  any  serious  effect  in  the  final  result. 


lO  DETERMINATION   OF   THE   SOLAK   PARALLAX 

DERIVATION    OF   THE    SOLAR   PARALLAX. 

The  change  in  the  ephemeris  correction  during  the  interval  between  evening  and 
morning  observations  was  applied  before  deriving  the  correction  to  the  solar  parallax. 
The  parallax  corrections  were  derived,  as  nearly  as  possible,  from  pairs  of  plates, 
one  evening  with  one  morning  plate,  with  the  view  of  showing  the  agreement  between 
small  groups  of  observations,  and  for  check  purposes.  The  details  of  the  derivation 
will  be  evident  from  the  table  containing  the  data.  In  accordance  with  preliminary 
investigations  made  by  us  and  other  astronomers,  it  did  not  seem  justifiable  to  include 
in  the  solution  any  other  unknowns  than  that  of  the  parallax. 


1900 

Octolwr 

3            8              U             18 

23             29 

November 
2               5              12              17 

Righl  Ascension 

22 

December 
27              2              7 

12 

17 

22 

27 

?000 

oo'^oo     Ooooo 

o     ©ooo         o 

oOooo           o"     °» 

oo 

ooo        oo     oooo 

oo. 

Oo" 

0 

■•■MO 

Declination 

'tJOO 

0      oooOoo     „„oOo 

•       o"""            O 

ooooo         „„    „^ 

•o 

Ooo        oo      o**Oo 

OOo 

.•• 

• 

<M 

Fig.  1. — Position  inequality  of  Eros. 

As  the  correction  to  the  ephemeris  has  been  carefully  determined  and  made  use  of, 
it  does  not  seem  worth  while  to  include  terms  depending  upon  uncertainties  in  any  of 
the  elements  of  the  orbit  of  Eros.  The  derivation  of  the  parallax  has  been  based 
wholly  upon  the  displacements  in  right  ascension,  as  0.97  of  the  total  parallactic 
displacement  is  in  this  direction,  and  because  of  the  smallness  of  the  displacement 
in  declination  at  this  latitude.  The  inclusion  of  any  declination  results  would  not 
have  strengthened  the  determination. 

Before  proceeding  to  a  final  discussion  of  the  results,  a  short  investigation  of  the 
possible  sources  of  systematic  error  is  pertinent. 

SYSTEMATIC    ERRORS. 

The  most  probable  sources  of  systematic  error  appeared  to  be  the  following : 

1.  Distortions  in  the  figure  of  the  great  mirror  of  the  telescope  due  to  the 

extreme  hour  angles  at  which  the  displacement  negatives  were  made. 

2.  Errors  in  the  refraction  constant. 

3.  Radial  distortion  (aberration)  of  the  star-images. 

4.  The  periodic  light  variation  of  Eros. 

5.  The  suspected  periodic  inequality  of  position  of  Eros. 

(l  and  2)  Sources  i  and  2  would,  if  present,  probably  reveal  themselves  in  a 
similar  manner,  and  they  have  been  considered  together. 


INTRODUCTION 


II 


October  5-18 


y        ptci. 


Nov.  23 -Dec  6 


As  already  explained,  two  methods  of  reduction,  particularly  adapted  to  testing 
some  of  these  points,  were  adopted.     These  two  systems  of  reduction  give  us  three 
ways  of  investigating  such  systematic  errors  as  the  two  mentioned. 
(«)  By  a  direct  comparison  of  the 
measured  coordinates  east  and 
west    with    each    other    and 
with  the  meridian  group  ; 
(J))  By  a  comparison  of  the  plate 
constants  derived  from  each 
of  the  two  solutions;  and 
(r)  By  an  examination  of  the  par- 
allax results  themselves, 
(a)  In   the  first   solution   the    same 
stars  are  used  both  east  and  west,  and 
their  coordinates  derived  from  the  center 
of  gravity   of    the    group.      After   the 
rectangular   measures    of   such    groups 
and  that  of  the  meridian  groups  have 
been  freed  from  the  effects  of  refraction 
and   referred   to    the    same    coordinate 
axes,  they  are  suitable  for  investigating 
this  question  without  further  reduction. 
For  this  purpose  the  sums  of  the  stand- 
ard coordinates  for  each  elongation  and 
for   the   meridian   have  been  obtained. 
As  only  the  X  coordinates  have  been 
used  in  the  parallax  determination,  it  is 
these   alone  with  which  we  shall  con- 
cern  ourselves.     If   there    are   no  sys- 
tematic errors,  such  as  in  the  assumed 
refraction,  distortions,  and  the  like,  the 
sum    of   the   east   group    should    agree 
exactly    with    those    of  the    west    and 
meridian  groups. 

As  a  preliminary,  these  sums  were 
tabulated  before  any  attempt  was  made  to  reduce  them  to  a  common  scale  value  or 
orientation.  The  resulting  comparison  showed  such  small  differences,  with  no  indica- 
tions of  system,  that  it  was  not  deemed  necessary  to  go  to  the  labor  of  a  complete 
reduction.  These  unreduced  results  are  given  in  the  table  on  page  12.  The  unit  is 
one  inch.  The  fifth  (last)  decimal  place  corresponds  almost  exactly  to  hundredths  of 
seconds  of  arc.     The  column  E-W,  therefore,  may  be  considered  as  such. 

When  we  consider  that  each  difference  in  the  column  E-W  contains  the  errors  of 
from  6  to  10  distances,  as  well  as  the  effect  of  scale  value  and  orientation,  we  must 
allow  that  they  are  small  and  do  not  show  any  evidence  of  distortion  and  refraction 
such  as  we  have  been  seeking.  All  of  these  differences  would  probably  be  diminished 
by  a  complete  reduction. 

(^)  As  the  plate  constants  rest  upon  measures  made  in  both  coordinates,  this  test 
contains  the  additional  element  of  the  declination  measures.  A  comparison  of  these 
constants  confirms  the  conclusion  reached  in  («),  viz.,  that  there  is  no  evidence  of  distor- 
tion of  the  mirror  or  of  errors  in  the  refraction  constant  employed. 


I    I 


Fig.  2.  —  Comparison  of  position  inequality  of  Eros  with 
period  of  light  variations  —  2''  38™. 


12 


DETERMINATION  OF   THE    SOLAR  PARALLAX 
Sums  of  East,  Meridian,  and  West  Rectangular  Coordinates. 


Date. 

F.A.ST. 

Meridian. 

West. 

E-W. 

Oct.     6 

12 

13 
14 
IS 
i6 

31 

34 
36 
29 

Nov.    3 
10 
38 

29 
Dec.     s 

5 
7 

34 

in. 

1.80276 
1.86327 
2.19286 

1-75576 
2.29890 
1-80555 
2.08389 
2.66303 
I.30517 
2.58931 
1. 79189 
2.21430 
2-55749 
3-21513 
1-84737 
2.34865 
1.56439 
2.11772 

in. 

1. 80321 

2.19391 
1-75548 
2.29965 
1.80538 
2.08479 
2.66541 

2.59019 

2.21509 

2-55747 
3.21237 
1.84762 
2.34866 
1-56393 

in. 

1.8036s 

1.86391 

2.19339 

I-75SIO 

2.29862 

1.80652 

2.08364 

2.66520 

1.30484 

2.58891 

1.79309 

2.21370 

2-55823 

3-21552 

1.84652 

2.34918 

1.56415 
2.11698 

-  89 

-  64 

-  53 
+  66 
+  28 

-  97 
+  25 
-217 

+  33 

+  40 

-  120 
+  60 

-  74 

-  39 
+  8s 

-  53 
+  24 
+  74 

{c)  The  zenith  distances  at  which  the  observations  were  made  were  larger  in  the  even- 
ing than  in  the  morning,  at  the  beginning  of  the  series.  The  zenith  distances  changed 
until,  at  the  end  of  the  series,  they  were  larger  in  the  morning  than  in  the  evening. 

The  values  of  the  parallax  derived  from  the  first  and  second  halves  of  the  period 
should  show  a  change  if  any  errors  of  the  nature  of  i  and  2  exist. 

An  examination  shows  no  greater  difference  than  is  to  be  expected. 

(3)  On  account  of  the  very  limited  field  in  the  Crossley  plates  over  which  the  star- 
images  are  round,  it  is  perhaps  a  question  whether  even  in  the  field  used  there  may  not 
be  radial  aberrations  which  can  not  be  detected  by  the  eye,  but  which  would  result  in 
systematic  error,  and  which  might  be  detected  in  a  long  series  of  observations.  A 
systematic  effect  of  this  sort  should  be  revealed  by  a  comparison  of  the  plate  constants 
for  the  two  solutions.  The  following  are  the  differences,  without  respect  to  sign,  be- 
tween the  constants  of  the  east  and  west  groups  of  the  entire  18  equations,  in  units  of 
the  sixth  decimal  place,  for  both  solutions  : 


SoLmiON. 

Scale  Value. 

Orientation. 

First 

Second    .... 

8267 
6943 

16086 
2119s 

The  scale  value  is  a  little  more  accordant  in  the  second  solution,  whereas  the  orien- 
tation is  more  accordant  in  the  first  solution.  The  absolute  values  of  the  constants 
given  above  are  of  little  importance,  as  they  are  affected  by  a  variety  of  conditions 
which  are  almost  entirely  eliminated  in  the  solution.  There  appears,  therefore,  to  be 
no  indication  of  any  systematic  effect  from  radial  aberration.  This  conclusion  is  con- 
firmed by  the  close  agreement  of  the  parallax  derived  from  the  two  independent 
solutions. 

(4)  By  arranging  the  values  of  the  parallax  in  the  order  of  their  derivation  from  the 
light  period,  any  dependence  upon  that  cause  should  be  shown.  Such  arrangements 
shoWj  no  relation. 


INTRODUCTION 


13 


(5)  As  has  already  been  pointed  out,  there  should  be  little  effect  on  the  derived 
parallax,  even  should  a  periodic  inequality  of  position  be  confirmed. 

WEIGHTS. 

The  only  grounds  upon  which  weights  have  been  assigned  are : 

A.  The  number  of  images  of  Eros  and  of  the  comparison-stars  concerned  in  an 
equation. 

B.  The  sizes  of  the  parallax  factors  (relative  inverse  distances  of  Eros  at  the  times 
of  observation). 

The  errors  of  observation  remaining  constant,  their  effect  on  the  resulting  parallax 
will  vary  as  the  inverse  distance  of  the  asteroid  at  the  time  of  observation.  It  is  well 
known,  however,  that  the  accuracy  of  a  result  is  not  directly  proportional  to  the  number 
of  plates  or  images  concerned.  As  an  experiment,  three  systems  have  been  used, 
namely,  unweighted,  square  root  of  weights,  full  weights. 

Solutions  have  been  made  also  according  to  certain  arbitrary  but  reasonable  assump- 
tions. The  results  of  the  various  assumptions  and  combinations  are  here  given  in  tabu- 
lar form : 


126  equations  (all)        

120  equations  (rejecting  o'.'ioo  and  over)  .  .  . 
122  equations  (rejecting  o'.'ioo  and  over)     .     .     . 

96  equations  (rejecting  o'.'o5o  and  over)     .     .     . 

92  equations  (rejecting  o'.'oso  and  over)     .     .     . 

18  dates 

18  dates  (rejecting  large  —  value  on  Oct.  13) 

Simple  mean  of  above 

WeigUei  —  Square  Root  of  Weights. 

126  equations  (all) 

120  equations  (rejecting  o'.'ioo  and  over)  .  .  . 
122  equations  (rejecting  o'.'ioo  and  over)     .     .     . 

96  equations  (rejecting  o'.'oso  and  over)     .     .     . 

92  equations  (rejecting  o'.'o5o  and  over)     .     .     . 

18  dates  (all) 

i8  dates  (rejecting  large  —  value  on  Oct.  13) 

Simple  mean  of  above 

Full  Weights. 

126  equations  (all) 

18  dates  (all) 

i8  dates  (rejecting  large  —  value  on  Oct.  13)     . 

Simple  mean  of  above 

General  mean,  all  three  weights  .     .     .     . 


+.0074 


Solution  i. 

Solution  1. 

// 

// 

+.0086 

-I-.0070 

+.0093 

-h.oo93 

+.OOS7 

+.0056 

+.0034 

+.0031 

-I-.00S8 

-I-.OOSO 

-I-.0066 

-h.oo6o 

-I-.0109 

+.009S 

-l-.oiis 

+.0114 

-I-.0067 

+.0065 

-(-.0041 

-(-.0039 

-|-.oo62 

-I-.00S6 

+.0077 

-f-.0072 

+.0130 

-f.oii8 

-f-.oo47 

-(-.0047 

-t-.oo6s 

+.0061 

+.oo8t 

-I-.0O7S 

-f-.oo69 


An  examination  of  the  results  of  the  different  assumptions  shows  a  systematic  differ- 
ence between  the  value  derived  from  equations  and  dates.  This  difference  is  due  to 
the  excess  of  \a.rge.  positive  corrections  over  large  negative  corrections  on  the  dates  giv- 
ing large  systematic  values  of  the  correction.  It  is  also  accentuated  by  a  large  negative 
correction  on  Oct.  13,  an  equation  which  we  would  probably  be  justified  in  rejecting 
altogether.     Hence  it  seems  certain  that  the  equations  (including  these  large  values) 


14  DETERMINATION  OF  THE  SOLAR  PARALLAX 

give  too  large  a  result,  and  that  the  dates  (including  the  large  negative  value  on  Oct.  13) 
give  too  small  a  value  of  the  parallax. 

In  my  opinion,  the  square  root  of  the  product  of  parallax  factors  and  of  the  number 
of  images  is  the  most  reliable  weight.     The  final  value  is  based  on  such  weights. 

THE   FINAL  VALUE   OF   THE   SOLAR   PARALLAX. 

The  slight  differences  between  the  results  of  so  many  combinations  seem  to  make 
it  unnecessary  to  go  into  further  refinements  of  weighting  and  selection.  If  we  take  the 
simple  mean  of  the  four  values  derived  respectively  from  all  equations,  equations  under 
o'.'oso,  all  dates  (Oct.  13  revised),  weighted  by  the  square  root,  we  find  values  which 
differ  but  slightly  from  those  based  on  any  of  the  other  reasonable  assumptions.  I 
therefore  consider  the  following  as  the  most  probable  values  of  the  solar  parallax  from 
the  two  solutions : 


Solution  I 

Solution  2 

8.80 
8.80 

+  .0070 
+  .0064 

As  there  seems  to  be  no  good  reason  why  one  of  these  values  should  be  given 
greater  weight  than  the  other,  the  simple  mean,  +  o'!oo6y,  is  adopted  as  the  final  result, 
making  the  value  of  the  solar  parallax 

TT  =  8'.'8067  ±  0'.'0025. 

The  assigned  probable  error  is  not  the  result  of  any  single  assumption,  but  is  esti- 
mated from  the  probable  errors  derived  in  several  ways,  as  follows : 

P.E..  126  equations ±©'.'0027 

96  equations ±    .0018 

18  daily  means ±    .0052 

IS  daily  means  (omitting  3  largest  values) ±    .0034 

8  results  used  in  final  combination ±    .0018 

After  the  reduction  of  the  measures  and  the  derivation  of  the  parallax,  the  plates 
(20  in  number)  showing  the  largest  discordances  were  completely  remeasured  and 
re-reduced.  To  test  five  of  these  results  still  farther,  a  third  set  of  measures  and 
another  complete  reduction  of  the  five  were  made.  The  measures  generally  reproduced 
the  original  results  very  closely.  The  substitution  of  the  twenty  remeasured  results 
would  have  changed  the  parallax  by  only  o'.'ooos.  This  was  considered  a  valuable 
check  on  the  early  measures  of  these  plates  and  on  the  reliability  of  all  the  measures. 
Only  the  original  measures  have  been  used  in  the  final  discussion. 


MERIDIAN   PLATE   MEASURES 
Table  I.  —  Meridian  Plate  Measures. 


IS 


Plate 
No. 

SXAK. 

P.  S.  T. 

X 

y 

Plate 

No. 

Stai. 

P.  S.  T. 

* 

y 

Oct.  5 

c 

Oct.  7 

c 

84 

a 

13  34  47 

— l8l02 

-66975 

110 

a 

13  37  47 

-65483 

-34620 

b 

- 14504 

+  8777 

b 

-51954 

+33320 

c 

+  3167 

+  28I4I 

c 

+  1136 

+  18776 

d 

+  5054 

—  46246 

d 

+  4204 

-  70299 

e 

+  599 1 

—  18790 

e 

+  7913 

-  70398 

f 

+ 10853 

+  7707 

f 

+  9406 

+36598 

g 

+  9596 

+ 4360s 

g 

+  25238 

-25115 

h 

+  53862 
(5?t.  5 

+  8426 
H 

h 

+  S3657 
Oct.  7 

- 18697 

H 

85 

a 

13  44  47 

-17886 

-67911 

112 

a 

13  SO  11 

-65241 

-35748 

b 

- 14369 

+  7873 

b 

-S1726 

+  32198 

c 

+  3308 

+  27222 

c 

+  1359 

+  17663 

d 

+  5202 

—  47160 

d 

+  4442 

-71427 

e 

+  6136 

—  19698 

e 

+  8152 

-71516 

f 

+  11001 

+  679s 

f 

+  9634 

+  35487 

g 

+  9714 

+  42711 

g 

+  25493 

-26234 

h 

+  53983 
Oct.  5 

+  7523 

c 

h 

+  53895 
Oct.  7 

-19827 
C 

90 

a 

14  IS  0 

-17594 

-70677 

113 

a 

13  53  24 

-65208 

-36019 

b 

- 13990 

+  SI07 

b 

-51640 

+  31898 

c 

+  3708 

+  24426 

c 

+  1424 

+  17366 

d 

+  5555 

-49947 

d 

+  4462 

-71722 

e 

+  6526 

-22494 

e 

+  8173 

-71803 

f 

+ I 1404 

+  4003 

f 

+  9672 

+  35186 

g 

+  10137 

+  39888 

g 

+  25512 

-26521 

h 

+  544" 
Oct.  6 

+  4698 
H 

h 

+  53913 
Oct.  8 

—  20119 
H 

98 

a 

13  34  IS 

- 19675 

-38712 

117* 

a 

13  36  0 

- 13489 

+  15002 

b 

—  20829 

+  27682 

b 

+  10518 

-  7470 

c 

-17707 

+  7308 

c 

+  3522 

+  20279 

d 

-  2857 

+ 19307 

d 

+  18198 

-10951 

e 

+  5971 

-28433 

e 

+  27629 

+  13547 

f 

+  11472 

-58252 

f 

+  29374 

+  25599 

g 

+  17685 

+  41466 

g 

+  37600 

+  31155 

h 

+  35361 

-31576 

h 

+  58712 

-  6774 

i 

+  53800 
Oct.  6 

+  4330 
C 

Oct.  8 

C 

100 

a 

13  43  1 

-  I9S45 

-39484 

118* 

a 

13  40  54 

- 13390 

+  14586 

b 

—  20696 

+  26894 

b 

— 10402 

-  7914 

c 

-17577 

+  6521 

c 

+  3629 

+  19827 

d 

-  2719 

+  18520 

d 

+ 18306 

-11392 

e 

+  6105 

-29227 

e 

+  27733 

+ 13095 

f 

+  11595 

-  59035 

f 

+  29488 

-25147 

g 

+  17827 

+  40668 

g 

+  37718 

+  30708 

h 

+  35485 

-32356 

h 

+  58814 

-  7228 

i 

+  53927 
Oct.  6 

+  3534 
H 

Oct.  8 

H 

102 

a 

13  57  6 

-19284 

-40775 

119 

a 

13  SO  0 

-1318s 

+  13560 

b 

—  20478 

+  25591 

b 

—  10191 

-  891 1 

c 

-17338 

+  5204 

c 

+  3832 

+18837 

d 

-  2503 

+ 17226 

d 

+ 18541 

-12369 

e 

+  6322 

-30515 

e 

+  27950 

+ 12101 

f 

+  11840 

-  60308 

f 

+  29698 

+  24162 

g 

+  18025  ; 

+  39371 

g 

+  37920 

+  29721 

b 

+  35703  ■ 

-33619 

h 

+  59043 

-  8200 

i 

+  54116 

+  2266 

*  These  times  have  been  changed  from  the  records  as  published  in  Lick  Observatory  Bulletin  No.  13  by  +2™. 


i6 


DETERMINATION  OF   THE   SOLAR  PARALLAX 
Table  I.  —  Meridian  Plate  Measures  —  Continued. 


Plate   « 
No. 

TAK. 

P.  S.  T. 

X 

y 

Plate 
No. 

Stak. 

P.  S. T. 

X 

y 

Oct.  9 

c 

Oct.  10 

H 

122 

a 

13  27  0 

— 11617 

+ 17963 

131 

a 

13  36  8 

-50186 

+  1500 

b 

-  916s 

-  25604 

b 

-40530 

—  6296 

c 

-  S167 

+  18448 

c 

-35170 

+  11224 

d 

-  4648 

-  6066 

d 

-10733 

-19313 

e 

-  6051 

—66147 

e 

-  4674 

+  43108 

f 

+  1442 

+  1032 

f 

+  253S5 

-  1772 

g 

+  5270 

+  34224 

g 

+  39239 

—  26992 

h 

+  9007 

-  6744 

h 

+  70482 

-32759 

u 

+  13820 

— 40660 

z 

+  1288 

+  3625 

Xl 

+  7849 

-31974 

Xj 

+  9337 

-28853 

y 

+  20662 

-25651 

z 

+  22166 
Oct.  9 

-33569 
c 

Oct.  12 

C 

123 

a 

13  30  II 

-"55° 

+  1770S 

142* 

a 

13  45  23 

-415x6 

+  25482 

b 

—  9098 

-25862 

b 

— 20118 

+  26746 

c 

-  5071 

+ 18204 

c 

-11380 

+  263 

d 

-  4559 

-  6324 

d 

-  8018 

-48759 

e 

-  5996 

-66417 

e 

+  13732 

+  1 501 

f 

+  1522 

+  764 

f 

+  19667 

-6435s 

e 

+  5361 

+  3397S 

g 

+  68942 

+  12602 

h 

+  9082 

—  7020 

u 

+ 13901 

-40939 

Xl 

+  79" 

-32246 

Xs 

+  941S 

—  29184 

y 

+  20750 

-  25909 

z 

+  22222 
Oct.  9 

-33856 
H 

Oct.  12 

H 

"S 

a 

13  40  47 

— 11282 

+ 16759 

143* 

a 

13  48  5 

-41411 

+  25298 

b 

-  8832 

-26798 

b 

—  20008 

+  26522 

c 

-  4825 

+  17234 

c 

— 11272 

+   78 

d 

-  4312 

-  7278 

d 

-  7966 

-49051 

e 

-  S702 

-67363 

e 

+  13802 

+  1337 

f 

+  1776 

-  183 

f 

+ 19690 

—  64646 

g 

+  S593 

+  33046 

g 

+  69003 

+  12378 

h 

+  9338 

-  7957 

u 

+ 14182 

-41882 

Xl 

+  8206 

-33188 

X2 

+  9697 

-30030 

z 

+  22506 
Oct.  10 

-34795 
H 

Oct.  12 

C 

129 

a 

13  29  43 

-S0372 

+  2067 

144* 

a 

13  SI  23 

-41308 

+  25029 

b 

—  40726 

-  5732 

b 

—  1 9901 

+  26241 

c 

-3S3S9 

+  11783 

c 

-11175 

-  230 

d 

— 10890 

-18759 

d 

-  7836 

—  49268 

e 

-  4853 

+  43683 

e 

+  13912 

+  1036 

f 

+  25162 

-  1187 

f 

+  19813 

-64868 

8 

+  39045 

-  26443 

g 

+  691 1 2 

+ 12080 

h 

+  70294 

-32220 

z 

+  1089 
Oct.  10 

+  4208 
C 

Oct.  13 

H 

130 

a 

13  33  0 

—  50296 

+  1804 

156 

a 

13  7  43 

-55474 

-44566 

b 

-40636 

-  6003 

b 

-54683 

+  2I4S 

c 

-35277 

+  "537 

c 

-12432 

+  24963 

d 

-10823 

-19032 

d 

+  4170 

-59295 

e 

-  4742 

+  43410 

e 

+  11705 

+ 14039 

f 

+  25260 

-  1492 

f 

+  20641 

-32341 

g 

+  39128 

—  26736 

g 

+  25243 

+  777 

h 

+  70377 

-32501 

h 

+  26364 

+  36854 

X 

+  1287 

+  3936 

*  These  times  have  been  changed  from  the  records  as  published  in  Lick  Observatory  Bulletin  No.  13  by  + 1". 


MERIDIAN   PLATE   MEASURES 
Table  I.  —  Meridian  Plate  Measures  —  Continued. 


17 


Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

Plate 
No. 

Star. 

P.  S.  T. 

* 

y 

Oct.  13 

c 

Oct.  IS 

c 

IS7 

a 

13  II  IS 

-55425 

-44876 

204 

a 

12  56  II 

-38691 

-33587 

b 

-54576 

+  i860 

b 

-24299 

-14974 

c 

— 12297 

+  24659 

c 

-  6068 

—  20248 

d 

+  4251 

-59634 

d 

-  5877 

+ 16844 

e 

+  11827 

+  13716 

e 

+ 12360 

+  41894 

f 

+  20760 

-32679 

f 

+ 1864s 

-46666 

g 

+  2S386 

+  463 

g 

+  38807 

-39620 

h 

+  26524 
Oct.  13 

+  36527 
c 

h 

i 

X 

+  42752 
+  52366 
+  7586 

Oct.  IS 

-  4079 
+  5846 
-43109 

H 

i6o 

a 

13  25  II 

-  54901 

-  46038 

205 

a 

12  59  0 

-38559 

-33834 

b 

-  54062 

+  696 

b 

-24179 

-15217 

c 

-11770 

+  23514 

c 

-  S92I 

-  20474 

d 

+  4724 

-60754 

d 

-  5770 

+  16625 

e 

+  12350 

+  12594 

e 

+ 12421 

+  41628 

f 

+  21224 

-  33807 

f 

+  18803 

-46885 

S 

+  25884 

-  678 

g 

+  38955 

-39794 

h 

+  27041 
Oct.  14 

+  35394 
C 

h 

i 

X 

+  42879 
+  52498 
+  7735 

Oct.  IS 

-  4259 
+  5686 

-43347 
C 

180 

a 

13  I  47 

-51882 

-34702 

207 

a 

13  II  0 

-38039 

-34782 

b 

-27038 

-13495 

b 

-23667 

— 16164 

c 

-  13498 

—  61629 

c 

-  5414 

-21452 

d 

— 12049 

+  876 

d 

-  5269 

+  15654 

e 

—  6420 

+  42001 

e 

+  12937 

+  40700 

f 

-  1314 

+  18757 

f 

+ 19309 

-47814 

g 

+ 14240 

-2IIS4 

g 

+  39436 

—  40726 

h 

+ 17169 

+  44900 

h 

+  43373 

-  5232 

i 

+  38826 
Oct.  14 

-  3233 
H 

i 

X 

+  52986 
+  8222 

Oct.  16 

+  4687 
-44285 

H 

181 

a 

13  6  0 

-51752 

-35069 

232 

a 

12  51  47 

-43086 

+  38895 

b 

-2687s 

-13850 

b 

-2I24S 

-36214 

c 

- 13360 

—  61989 

c 

-  19560 

-13288 

d 

-11884 

+  500 

d 

-  9092 

-  4536 

e 

-  6257 

+  41660 

e 

+  2367 

+   92 

f 

-  1152 

+ 18401 

f 

+  4782 

+  45884 

g 

+ 1440S 

—  21520 

g 

+ IOI24 

-  2907 

h 

+  17329 

+  44528 

h 

+  22085 

+  8296 

i 

+  38992 
Oct.  14 

-  3590 
H 

i 

X 

+  47318 
+  1540 

Oct.  16 

-19424 
-  5929 

H 

182 

a 

13  8  S4 

-51624 

-35316 

235 

a 

13  8  6 

-42356 

+  37635 

b 

-26774 

— 14069 

b 

-20520 

-37464 

c 

-13230 

-62237 

c 

-  1883s 

-14556 

d 

-11782 

+   272 

d 

-  8361 

-  5792 

e 

-  6148 

+  41418 

e 

+  3098 

—  1169 

f 

-  I04S 

+ 18161 

f 

+  5500 

+  44626 

g 

+  14510 

-21754 

g 

+ 10836 

-  4171 

h 

+  17427 

+  44301 

h 

+  22796 

+  7038 

i 

+  39088 

-  381S 

i 

X 

+  48020 
+  2251 

—  20670 

-  7187 

i8 


DETERMINATION   OF   THE   SOLAR   PARALLAX 

Table  I.  —  Meridian  Plate  Measures  —  Continued. 


Plate 
No. 

SlAK. 

P.  S.  T. 

* 

y 

Plate 
No. 

Stak. 

P.  S.  T. 

X 

y 

Oct.  16 

H 

Oct.  23 

c 

236 

a 

13  II   I 

-42256 

+  37434 

273 

a 

12  30  2 

-51415 

+  1042 

b 

-  20386 

-37724 

b 

-35950 

-41276 

c 

-18692 

-14789 

c 

-  20942 

+ 15082 

d 

-  822s 

-  6037 

d 

- 18499 

-30414 

e 

+  3223 

-  1388 

e 

-17990 

+ 13308 

f 

+  5634 

+  44405 

f 

+  32881 

+  5186 

S 

+ 10989 

-  4398 

S 

+  56991 

—  2287 

h 

+  22941 

+  6808 

h 

+  S7200 

+  42426 

i 

+  48179 

—  20896 

z 

+  2397 
Oct.  21 

-  7441 
C 

Oct.  24 

H 

258 

a 

12  31  24 

-41816 

+  33853 

286 

a 

12  23  8 

-  54839 

-29285 

b 

-  24684 

+  11756 

b 

-36396 

+  30794 

c 

-13563 

— 12480 

c 

-  28675 

-23739 

d 

-  3458 

+  64820 

d 

-21942 

-53415 

e 

+  1821 

—  41920 

e 

+  2728 

+ 14393 

f 

+  27916 

-38388 

f 

+  4791 

-  2265 

S 

+  40301 

+  413 

e 

+  8390 

+  34070 

h 

+  49864 

-  7753 

h 

+  23064 

+ 15395 

X 

-  50635 

+  52016 

i 

+  36204 

-36606 

y 

+  64893 
Oct.  21 

—  91622 
H 

j 

+  44684 
Oct.  24 

-  3015 
C 

»S9 

a 

12  30  0 

-41307 

+  33438 

287 

a 

12  32  23 

-54232 

-29815 

b 

-  24207 

+  1 1 296 

b 

-35802 

+  30283 

c 

-13139 

— 12960 

c 

-  28058 

-24291 

d 

-  2918 

+  64358 

d 

-21331 

-53950 

e 

+  2201 

-42415 

e 

+  3342 

+ 13863 

f 

+  28310 

-38928 

f 

+  5375 

-  2784 

K 

+  40742 

-  130 

e 

+  8979 

+  33572 

h 

+  50285 

-  8299 

h 

+  23687 

+ 14892 

y 

+  65191 
Oct.  21 

—  92276 
C 

i 
J 

+  36816 
+  45302 

Oct.  24 

-37139 
-  3519 

H 

260 

a 

12  42  It 

-41131 

+ 3319s 

288 

a 

12  35  23 

-54029 

-  29983 

b 

—  24036 

+ 11058 

b 

-35569 

+  30098 

c 

—  12948 

-13186 

c 

-27856 

-  24442 

d 

-  2734 

+  64083 

d 

-21154 

-54122 

e 

+  2380 

—  42621 

e 

+  3550 

+ 13686 

f 

+  28474 

-39135 

f 

+  5581 

-  2984 

E 

+  40935 

-  381 

K 

+  9202 

+  33354 

h 

+  50470 

-  8537 

h 

+  23889 

+ 14680 

y 

+  65420 
Oct.  23 

-92470 
H 

i 
j 

+  37008 
+  45504 

Oct.  25 

-37329 
-  3738 

c 

372 

a 

12  26  48 

-51594 

+  1 291 

3»i 

a 

12  3  8 

-  36980 

—  12649 

b 

-36160 

+  41037 

b 

-2731S 

+  12608 

c 

— 21150 

+  15244 

c 

—  26250 

+  II56 

d 

- 18704 

-30199 

d 

-  3443 

- 19909 

e 

-18186 

+ I3S47 

e 

+  4617 

+  7066 

f 

+  32718 

+  5356 

f 

+  13159 

+  1587 

g 

+  56829 

—  2112 

K 

+  21721 

-36555 

h 

+  57018 

+  42613 

h 

i 

+  34079 
+  52712 

+  26982 
-I6I98 

MERIDIAN   PLATE   MEASURES 
Table  I.  —  Meridian  Plate  Measures  —  Continued. 


19 


Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

Plate 
No. 

Stai. 

p.  S. T. 

X 

y 

Oct.  25 

H 

Oct.  29 

H 

312 

a 

12  5  43 

-  36800 

-12791 

353 

a 

11  51  36 

-47756 

-  5005 

b 

-27139 

+ 12426 

b 

-38548 

-  25608 

c 

—  26090 

+  lOOI 

c 

-35746 

+ 15700 

d 

-  3267 

—  20064 

d 

-13437 

+  5874 

e 

+  4780 

+  6900 

e 

+  6775 

+  24409 

f 

+  13329 

+  I4II 

f 

+  20149 

+  5527 

g 

+  21882 

-36724 

g 

+ 1932s 

-  2418 

h 

+  34256 

+  26803 

h 

+  36217 

+  3188 

i 

+  52879 
Oct.  25 

-I638I 
c 

i 
z 

y 

z 

+  39465 
+  17217 
+  18227 
-53663 
Oct.  29 

-25217 
-26599 
—  24284 
+  43086 
H 

314 

a 

12  17  58 

-35966 

- 13484 

354 

a 

II  54  36 

-47519 

-  S134 

b 

-26288 

+  1 1 786 

b 

-38307 

-25745 

c 

-25237 

+  309 

c 

-35505 

+ 15584 

d 

-  2417 

-20756 

d 

-13195 

+  5727 

e 

+  5631 

+  6226 

e 

+  7015 

+  24274 

f 

+  14158 

+  748 

f 

+  20376 

+  5380 

g 

+  22718 

-37384 

g 

+  19544 

-  2584 

h 

+  35104 

+  26IIS 

h 

+  36429 

+  3016 

i 

+  53717 

-17037 

i 
z 

y 

z 

+  39708 
+  17405 
+ 18451 
-66253 

-25387 
-26777 

-  24393 
+  38737 

Oct.  26 

C 

Oct.  29 

H 

329 

a 

12  a   II 

-39476 

+  5694 

355 

a 

II  57  43 

-47298 

-  5275 

b 

-10750 

+  17538 

b 

-38074 

-25878 

c 

-  8103 

+  3739 

c 

-35269 

+  IS458 

d 

-  7816 

-39557 

d 

-12956 

+  5591 

e 

+  1022 

+  9989 

e 

+  7253 

+  24168 

f 

+ 19984 

+ 16098 

f 

+  20623 

+  .  5275 

K 

+  22681 

- 14969 

g 

+  19778 

—  2710 

h 

+  2x954 

-52279 

h 

+  36688 

+  2900 

X 

-  30*3 
Oct.  26 

+ 18702 
C 

i 
z 

y 

z 

+  39945 
+  17645 
+ 18685 
—  66036 
Nov.  I 

-25496 
-26855 
-  24508 
+  38649 

H 

330 

a 

12  5  0 

-39322 

+  5512 

360 

a 

II  39  0 

-30676 

+  7917 

b 

-10572 

+  17378 

b 

-34206 

+  21500 

c 

-  789s 

+  3626 

c 

-  5760 

-11678 

d 

—  7602 

-39687 

e 

+  1035 

+  13122 

e 

+  1210 

+  9853 

f 

+  23414 

+  9612 

f 

+  20184 

+  15977 

g 

+  25777 

+  35465 

K 

+  22885 

-15118 

h 

+  33483 

-  3210 

h 

+  22192 

-52387 

z 

-31772 

+  222 

z 

-  2836 
Oct.  26 

+  18544 
H 

y 

z 

+  25559 
+  32309 

Nov.  1 

+  4418 
—  24162 

H 

331 

a 

12  8  I 

-39103 

+  5394 

361 

a 

II  42  23 

-30419 

+  7814 

b 

-10325 

+  17236 

b 

-33919 

+  21412 

c 

-  7680 

+  3469 

c 

-  5494 

-11775 

d 

-  7408 

-39838 

d 

-  2569 

-S2285 

e 

+  1440 

+  9709 

e 

+  1295 

+ 12999 

f 

+  20398 

+  15798 

f 

+  23683 

+  9491 

g 

+  23100 

-15285 

g 

+  26027 

+  35350 

h 

+  22385 

+  52535 

h 

+  33737 

-  3310 

z 

-  2594 

+  18383 

z 

y 

z 

-31468 
+  25789 
+  32587 

+   128 

+  4323 
-24270 

20 


DETERMINATION   OF   THE   SOLAR  PARALLAX 
Table  I.  —  Meridian  Plate  Measures  —  Continued. 


Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

Nov.  I 

H 

Nov.  3 

H 

362 

a 

II  45  8 

-30178 

+  771S 

411 

a 

II  23  6 

—  36822 

-31501 

b 

-33719 

+  21296 

b 

-33061 

+  9804 

c 

-  5262 

-11874 

c 

-27119 

-  7218 

d 

—  2300 

-52379 

d 

-15958 

+  12285 

e 

+  1523 

+  12919 

e 

+  17763 

+  8463 

f 

+  23901 

+  9408 

f 

+  35655 

+  888 

g 

+  26236 

+  35286 

g 

+  36652 

-15910 

h 

+  33986 

-  3384 

h 

+  40064 

-37586 

X 

-3124s 

+   23 

X 

+  22670 

-15256 

y 

+  26079 

+  4228 

z 

+  32848 
Nov.  2 

-24331 
H 

Nov.  3 

C 

384 

a 

11  2S  47 

-  2448s 

+  11418 

414 

a 

11  36  15 

-35678 

-31832 

b 

-16413 

+  8978 

b 

-31964 

+  9485 

c 

-1387s 

+  33076 

c 

—  26006 

-  7524 

d 

-12786 

+  1656 

d 

— 14861 

+  11987 

e 

-  8134 

+  8062 

e 

+ 18831 

+  8179 

f 

+  11958 

— 19646 

f 

+  36734 

+  612 

K 

+  27094 

-  26439 

g 

+  37729 

— 16192 

h 

+  31010 

— 14090 

h 

+  41195 

-37852 

z 

+  38897 
Nov.  2 

- 13462 
C 

X 

+  23769 
Nov.  4 

-15526 
H 

38s 

a 

11  29  II 

-24199 

+  11323 

439 

a 

II  4  0 

-31522 

-  4859 

b 

-16144 

+  8911 

b 

-18513 

+ 18820 

c 

-13596 

+  32996 

c 

— 16294 

—  44266 

d 

-12504 

+  1572 

d 

— III2S 

-49507 

e 

-  7853 

+  7993 

e 

+  4553 

—  16277 

f 

+  12231 

-19702 

f 

+  8909 

-  7046 

g 

+  27348 

-26518 

g 

+  9285 

+  4144 

h 

+  31284 

— 14161 

h 

■  +45833 

-  6492 

X 

+  39142 
Nov.  2 

-13572 
H 

i 

+  47764 
Nov.  4 

—  2920 
C 

386 

a 

"  36  S4 

-23571 

+ I 1096 

441 

a 

II  II  1 

-30936 

-  4978 

b 

- 15486 

+  8662 

b 

-1 7919 

+  18695 

c 

-I29S7 

+  32758 

c 

-15710 

-44374 

d 

— 11892 

+  1368 

d 

- 10542 

-49636 

e 

-  7228 

+  7766 

e 

+  5159 

- 16403 

f 

+  12851 

- 19932 

f 

+  9501 

-  7192 

g 

+  27963 

-26709 

g 

+  9912 

+  4013 

h 

+  31904 

- 14383 

h 

+  46474 

-  6636 

X 

+  3974S 
Nov.  3 

-13767 
C 

i 

+  48374 
Nov.  4 

-  3073 
H 

408 

a 

II  10  0 

-37930 

-31224 

443 

a 

II  24  23 

—  29807 

-  5263 

b 

-34179 

+ lOIII 

b 

-16753 

+ 18405 

c 

—  28224 

-  6928 

c 

-14577 

-44650 

d 

-17047 

+ 12604 

d 

-  9416 

-49899 

e 

+  16680 

+  8785 

e 

+  6265 

— 16669 

f 

+  34591 

+  1204 

f 

+  10677 

-  7446 

g 

+  35565 

-15620 

g 

+ 11039 

+  3740 

h 

+  38977 

-37297 

h 

+  47576 

-  6930 

z 

+  21562 

- 14959 

i 

+  49483 

-  33S8 

MERIDIAN   PLATE   MEASURES 
Table  I.  —  Meridian  Piate  Measures  —  Continued. 


21 


Plate 
No. 

Stak. 

P.  S.  T. 

X 

y 

Plate 
No. 

Stak. 

p.  S.  T. 

X 

y 

Nov.  s 

c 

Nov.  9 

c 

44S* 

a 

10  59  0 

-79298 

-33103 

466 

a 

10  48  48 

-49091 

-  5080 

b 

-7SS88 

-23766 

b 

-22244 

+ 10062 

c 

-39471 

-13769 

c 

-15650 

— 16696 

d 

-22132 

+  424 

d 

-  8988 

+  24193 

e 

+  3169 

-  26845 

e 

+  1444 

-60878 

f 

+  3623 

-14514 

f 

+  S390 

+  17120 

g 

+  31752 

+  32310 

g 

+  9722 

-  28383 

h 

+  38342 

-22540 

h 

+  15380 

+  37007 

i 

+  13113 

—  22694 

i 

+  15391 

+  39278 

z 

—  24002 

-11988 

J 

+  36967 

-  20088 

y 

-11118 

—  6670 

z 

-  9613 
Nov.  s 

+  4042 

H 

Nov.  9 

H 

447 

a 

II  5  0 

—  78824 

-33217 

467 

a 

II   2  54 

-47893 

-  5050 

b 

-75111 

-23882 

b 

-21045 

+ 10096 

c 

-38977 

-13827 

c 

- 14440 

— 16647 

d 

-21633 

+  332 

d 

-  7791 

+  24217 

e 

+  3689 

-  26938 

e 

+  2662 

—  60790 

f 

+  4134 

- 14596 

£ 

+  6566 

+  17203 

g 

+  32262 

+  32221 

g 

+  1091S 

-28298 

h 

+  38871 

—  22621 

h 

+  16577 

+  37094 

i 

+ 13637 

—  22767 

i 

+  16570 

+  39375 

X 

-  23499 

— 12070 

j 

+  38158 

—  20014 

y 

—  10670 

-  6730 

z 

-  9103 
Nov.  s 

+  3940 
C 

Nov.  10 

C 

4SO 

a 

II  23  54 

-77213 

-33568 

486 

a 

10  30  0 

-44917 

+  12650 

b 

-  73482 

— 24181 

b 

-  444S9 

-  7963 

c 

-37372 

-14187 

c 

-37158 

-32769 

d 

—  20022 

+   52 

d 

-17357 

-10578 

e 

+  527s 

-27256 

e 

-13929 

+  22767 

£ 

+  5699 

—  14892 

£ 

+  24384 

+  55084 

g 

+  33838 

+  31966 

g 

+  25596 

+  33870 

h 

+  40451 

-22932 

h 

+  32110 

+ 15809 

i 

+  15226 

-  23096 

t 

+  21084 

-  2278 

z 

-21896 

—  1 2406 

w 

+  44854 

+ 16026 

y 

-  9073 

—  7018 

z 

-15929 

+  2063 

z 

-  7502 
Nov.  9 

+  3680 
H 

y 

z 

—  14656 
-11574 

Nov.  10 

+  1366 
+  1415 

H 

464 

a 

10  40  54 

-49716 

-  5097 

487 

a 

10  37  0 

-44336 

+  12634 

b 

-22872 

+ 10068 

b 

-43876 

-  7910 

c 

— 16304 

- 16693 

c 

-36585 

-32731 

d 

—  96x6 

+  24202 

d 

-16753 

-10522 

e 

+  775 

-60851 

e 

-13342 

+  22801 

£ 

+  4748 

+  17145 

£ 

+  24952 

+  55041 

g 

+  9066 

-28369 

g 

+  26177 

+  33903 

h 

+  14783 

+  37022 

h 

+  32690 

+  15829 

i 

+  14761 

+  39299 

t 

+  21651 

—  2240 

J 

+  36320 

—  20096 

w 

z 

y 

z 

+  45407 
-IS354 
- 14055 
-10952 

+ 16003 
+  2101 
+  1408 
+  1432 

*  The  time  for  this  plate  has  been  changed  from  the  records  as  published  in  Lick.  Observatory  Bulletin  No.  13  by  +  i°*. 


32 


DETERMINATION   OF   THE   SOLAR   PARALLAX 
Table  I.  —  Meridian  Plate  Measures  —  Continued. 


Plate 
No. 

Stak. 

p.  S.  T. 

X 

y 

Plate 
No. 

Stai. 

P.  S.  T. 

X 

y 

Nov.  10 

c 

Nov.  13 

H 

492 

a 

II  0  0 

-42388 

+  12757 

539 

a 

10  12  0 

-27527 

— 14048 

b 

-41984 

-  7802 

b 

-25206 

-  6591 

c 

-34703 

-32636 

c 

-11578 

+  4534 

d 

— 14814 

— 10407 

d 

-  2280 

—  1164 

e 

-1140S 

+  22930 

e 

+  1873 

+  19506 

f 

+  26882 

+  S5169 

f 

+  5176 

-36914 

g 

+  28106 

+  34052 

g 

+ 12662 

+  12865 

h 

+  34642 

+ 15981 

h 

+  31514 

+ 10706 

w 

+  47353 

+  16125 

i 

+  45831 

+  14451 

z 

-1339s 

+  2229 

u 

+  44202 

+  8662 

y 

-11097 

+  1568 

V 

-51 798 

-13669 

z 

-  9037 
Nov.  12 

+  1574 

H 

w 

+  33339 

Nov.  13 

-18479 
C 

SI& 

a 

10  16  I 

—  26961 

+  718 

540 

a 

10  15  0 

-27290 

- 13986 

b 

-11178 

-15965 

b 

-  24972 

-  6517 

c 

-  7636 

+ 18224 

c 

—  11360 

+  4597 

d 

-  1493 

+  4903 

d 

—  2041 

-  1078 

e 

+  189SS 

+  51307 

e 

+  2104 

+  I9S79 

f 

+  34230 

— 13121 

f 

+  5429 

-36839 

K 

+  48876 

-  7712 

g 

+  12887 

+  12938 

h 

+  48176 

- 14698 

h 

+  31732 

+ 10780 

z 

-201 13 

-15576 

i 

+  46064 

+ 14529 

z 

+  39085 
Nov.  12 

+ 12622 
C 

u 

V 

w 

+  44450 
-51548 
+  33606 

Nov.  23 

+  8743 

-13611 

- 18431 

H 

S19 

a 

10  19  23 

-  26678 

+  662 

571* 

a 

9  11  36 

-35081 

+  29216 

b 

- 10888 

-15951 

b 

-35602 

-26313 

c 

-  7352 

+ 18244 

c 

-21468 

+  14752 

d 

—  1222 

+  4946 

d 

+  2394 

+  17842 

e 

+ 19230 

+  51366 

e 

+  4890 

-  4829 

f 

+  34530 

-13107 

f 

+  17559 

+  27591 

g 

+  49131 

-  7698 

g 

+  26192 

+  23104 

h 

+  48441 

- 14683 

h 

+  52231 

-33093 

z 

-19857 

-15598 

z 

+  39346 
Nov.  12 

+  12625 
H 

Nov.  23 

C 

S20 

a 

10  22  6 

-  26447 

+  797 

573* 

a 

9  17  47 

-34732 

+  29582 

b 

— 10661 

-15854 

b 

-35260 

-25962 

c 

-  7129 

+ 18350 

c 

—  21128 

+ 15104 

d 

-  988 

+  5002 

d 

+  2761 

+ 18212 

e 

+ 19471 

+  51400 

e 

+  5280 

-  4542 

f 

+  34778 

-13023 

f 

+  17926 

+  27991 

g 

+  49393 

-  7615 

g 

+  26614 

+  23472 

h 

+  48802 

— 14612 

h 

+  52599 

-32752 

X 

-19625 

-15498 

z 

+  39602 
Nov.  13 

+ 12703 
C 

Nov.  23 

H 

S38 

a 

10  9  23 

-  27744 

-  1410S 

576* 

a 

9  37  54 

-33565 

+  30799 

b 

+  25449 

-  6631 

b 

-34102 

-24756 

c 

-11797 

+  4488 

c 

- 19940 

+  16327 

d 

-  2501 

—  1211 

d 

+  3918 

+ 19420 

e 

+  1652 

+ 19469 

e 

+  6420 

-  3248 

f 

+  4974 

-36960 

f 

+ 19088 

+  29152 

g 

+  12452 

+ 12804 

g 

+  27737 

+  24661 

h 

+  31307 

+ 10657 

h 

+  53765 

-31533 

i 

+  45644 

+  14499 

t 

-73553 

-18542 

u 

+  44002 

+  8623 

V 

-52026 

-13715 

w 

+  33165 

-18533 

*  These  times  have  been  changed  from  the  records  as  published  in  Lick  Observatory  Bulletin  No.  13  by  —5™. 


MERIDIAN   PLATE   MEASURES 
Table  I.  —  Meridian  Plate  Measures  —  Continued. 


23 


Plate 
No. 

Stak. 

P.  S.  T. 

X 

y 

Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

Nov.  24 

c 

Nov.  29 

H 

S88 

a 

9  36  SI 

-56529 

— 10498 

660 

a 

8  50  54 

-  74395 

+  8149 

b 

-  56494 

+  7730 

b 

-49432 

—  22982 

c 

+  5871 

+  49910 

c 

—  48190 

-27761 

d 

+ 16916 

—  50614 

d 

+  16818 

+  28070 

e 

+  2IOIS 

-50642 

e 

+  22908 

+  15538 

f 

+  32222 

+  64096 

f 

+  25598 

—  48426 

g 

+  3975° 

+  40580 

g 

+  35333 

-  9318 

h 

+  40772 
Nov.  27 

+  25659 

H 

h 

+  40695 
Nov.  29 

-  694 
C 

602 

a 

9  0  53 

-  53034 

+  7736 

661 

a 

8  S3  54 

-74248 

+  8454 

b 

-15973 

- 14442 

b 

-49353 

-22680 

c 

-  9759 

+  41238 

c 

-48108 

-27463 

d 

+  2382 

-36472 

d 

+ 16953 

+  28288 

f 

+  24277 

+  9920 

e 

+  23028 

+  15737 

E 

+  S0302 

-  2342 

f 

+  25647 

-48189 

h 

-50523 
Nov.  27 

—  21660 
H 

g 
h 

+  35412 

+  40774 

Nov.  29 

—  9102 

-  509 

H 

606 

a 

9  13  I 

-52508 

+  8593 

666 

a 

9  9  8 

-73764 

+  9531 

b 

-15478 

-13516 

b 

-48813 

-21599 

c 

+  9268 

+  42089 

c 

-47572 

—  26360 

d 

+  2908 

-35542 

d 

+ 17437 

+  29492 

f 

+  24738 

+ 10797 

e 

+  23527 

+ 16950 

e 

+  50721 

-  1425 

f 

+  26220 

-  46988 

h 

-49990 
Nov.  28 

-20725 
C 

g 
h 

+  35941 
+  41319 

Dec.  2 

-  7882 
+   733 

H 

627 

a 

8  55  43 

—  60420 

+  11550 

679 

a 

8  38  23 

-48778 

+  31482 

b 

-45361 

+  26292 

b 

-24974 

-34688 

c 

-1118s 

-16737 

c 

-23198 

-54S4I 

d 

+  9474 

+  27985 

d 

+  309' 

+  13157 

e 

+ 16842 

-43665 

e 

+  7065 

+  36710 

f 

+  29099 

-48810 

f 

+  12638 

- 19634 

e 

+  38118 

-  24560 

g 

+  26494 

-2118s 

h 

+  52912 
Nov.  28 

+ 11920 
H 

h 

z 

+  37531 
+  1716 

Dec.  2 

+  36442 
+  55887 

C 

639 

a 

9  I  S3 

-60157 

+ 12016 

680 

a 

8  41  0 

-48718 

+  31652 

b 

-45103 

+  26771 

b 

—  24900 

-34482 

c 

- 10950 

-16278 

c 

-23109 

-  54354 

d 

+  9724 

+  28449 

d 

+  3113 

+  13334 

e 

+  17059 

-43207 

e 

+  7120 

+  36954 

f 

+  29292 

-48331 

f 

+  12796 

-19392 

8 

+  38331 

-24085 

g 

+  26572 

-209S4 

h 

+  53130 
Nov.  28 

+ 1237s 
C 

b 

z 

+  37560 
+  1772 

Dec.  2 

+  36677 
+  56143 

H 

630 

a 

9  4  54 

—  60025 

+  12236 

681 

a 

8  44  I 

—  48640 

+  31953 

b 

-44998 

+  26984 

b 

-  24856 

-34207 

c 

-1083 1 

— 16048 

c 

-23091 

-54072 

d 

+  9858 

+  28673 

d 

+  3208 

+ 13599 

e 

+  17177 

-42974 

e 

+  7204 

+  37186 

f 

+  29406 

—  48110 

f 

+  12741 

-1916s 

g 

+  38464 

-  23860 

i 

+  26607 

—  20711 

h 

+  53258 

+ 12610 

h 

z 

+  37663 
+  1870 

+  36901 
+  56387 

24 


DETERMINATION   OF   THE   SOLAR   PARALLAX 
Table  I.  —  Meridian  Plate  Measures  —  Continued. 


Plate 
No. 

Star. 

P.  S. T. 

X 

y 

Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

Dec.  3 

c 

Dec.  6 

c 

698 

a 

8  36  0 

—  64636 

+  8642 

756* 

a 

8  IS  0 

-41213 

-  34605 

b 

-  30304 

-23967 

b 

-39492 

-11782 

c 

— 10844 

+  69852 

c 

-10373 

—  26491 

d 

— 12161 

-  7697 

d 

-  5594 

-  7525 

e 

+  27892 

—66492 

e 

+  25689 

-  50948 

f 

+  76046 
Dec.  3 

-  8839 
c 

f 

g 
h 

+  32241 
+  36287 
+  43996 

Dec.  6 

+  30422 
-49963 
-27465 

H 

699 

a 

8  39  0 

—  64622 

+  8844 

758* 

a 

8  21  11 

—  41190 

-33990 

b 

-30299 

-23750 

b 

-39475 

-11179 

c 

-10857 

+  70091 

c 

- 10348 

-25907 

d 

-1213s 

-  7430 

d 

-  5S8o_ 

-  6938 

e 

+  27904 

—  66260 

e 

+  25713 

-  50380 

f 

+  76059 
Dec.  3 

-  8588 

H 

f 

g 
h 

+  32255 
+  36307 
+  44008 

Dec.  6 

+  30898 
-49398 
-  26884 

C 

700 

a 

8  42  0 

-64573 

+  9112 

759* 

a 

8  24  0 

-41178 

-33708 

b 

-30201 

-23472 

b 

-39450 

— 10894 

c 

-10825 

+  70344 

c 

- 10338 

—  25622 

d 

—  1 2064 

-  7182 

d 

-  5582 

—  6692 

e 

+  2799s 

-65955 

e 

+  25714 

-  50098 

f 

+  76114 
Dec.  s 

-  8311 
H 

f 

g 
h 

+  32276 
+  36304 
+  43994 

Dec.  7 

+  31174 
-49140 
—  26627 

H 

72s 

a 

8  18  0 

-34863 

-33578 

787 

a 

8  11  0 

—  20412 

-49173 

b 

-13723 

-52750 

b 

—  16192 

- 19805 

c 

—  1230 

+  8046 

c 

-11993 

-33871 

d 

+  4623 

— 14161 

d 

-  2058 

- 15649 

e 

+ 14471 

+  20243 

e 

-  3022 

-19789 

f 

+  22878 

+  51422 

f 

+ I 1053 

+  20844 

g 

+  37448 

-32754 

g 

+  21301 

-  5421 

h 

+  64176 
Dec.  s 

+  14532 
C 

h 

+  60245 
Dec.  7 

-13227 
C 

726 

a 

8  21  II 

-  34843 

-33265 

790 

a 

8  20  0 

-  2045  s 

-48421 

b 

-13736 

-52442 

b 

— 1621S 

-18987 

c 

—  1206 

+  8363 

c 

—  1 2008 

-33076 

d 

+  4646 

-13876 

d 

—  2080 

-14796 

e 

+ 14520 

+  20546 

e 

-  3045 

-18952 

f 

+  22928 

+  51718 

f 

+  11027 

+  21692 

S 

+  37472 

-32491 

g 

+  21269 

-  4596 

h 

+  64215 
Dec.  5 

+  14771 
H 

h 

+  60201 
Dec.  7 

-12387 
H 

738 

a 

8  27  0 

-34813 

-32750 

791 

a 

8  23  0 

—  20482 

-48031 

b 

-  13649 

-51938 

b 

— 16226 

-18675 

c 

—  1170 

+  8874 

c 

—  1 2041 

-32738 

d 

+  4703 

-13351 

d 

-  2094 

- 14504 

e 

+  14553 

+  21067 

e 

-  3063 

-18667 

f 

+  22956 

+  52287 

f 

+ I 103s 

+  2I9S4 

g 

+  37530 

-3195s 

g 

+  21269 

-  4308 

h 

+  64227 

+ 15348 

h 

+  60171 

— 12120 

*  These  times  have  been  changed  from  the  records  as  pubUshed  in  Lick  Observatory  Bulletin  No.  13  by  +ini. 


MERIDIAN  PLATE   MEASURES 
Table  I.  —  Meridian  Plate  Measures  —  Continued. 


25 


Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

Plate 
No. 

Stak. 

P.  S.  T. 

X 

y 

Dec.  8 

c 

Dec.  II 

H 

821 

a 

8  20  ss 

—  50600 

+  26237 

847 

a 

8  4  47 

—  40849 

+  26620 

b 

-  20863 

-40874 

b 

-39407 

-  6529 

c 

-  9673 

+ 15378 

c 

-  9182 

+  30838 

d 

-  3299 

+  35177 

d 

+ 13391 

-  48054 

e 

+ 10881 

- 14589 

e 

+ 16189 

-  4246 

f 

+  29451 

- 10403 

f 

+ 16208 

-11978 

g 

+  34182 

-  4213 

g 

+  45452 

+  31830 

h 

+  60515 
Dec.  8 

+  28174 
c 

h 

X 

+  59731 
+ 10764 

Dec.  11 

+  36588 
+  50132 

C 

823 

a 

8  27  0 

-50632 

+  26817 

848 

a 

880 

-40927 

+  26937 

b 

-  20903 

-40230 

b 

-39475 

-  6218 

c 

-  9715 

+ 15968 

c 

-  9256 

+  31169 

d 

-  3335 

+  35785 

d 

+  13312 

-47740 

e 

+ 1083s 

-13978 

e 

+  16125 

-  3927 

f 

+  29387 

-  9796 

f 

+  16125 

—  1 1669 

g 

+  34119 

-  3603 

g 

+  45377 

+  32152 

h 

+  60453 
Dec.  8 

+  28789 

H 

h 

z 

+  59666 
+  10685 

Dec.  II 

+  36914 
+  50418 

H 

824 

a 

8  30  0 

-  50668 

+  27123 

849 

a 

8  10  43 

-40971 

+  27224 

b 

—  20940 

-  39990 

b 

-39526 

-  5946 

c 

-  9743 

+  16265 

c 

-  9315 

+  31430 

d 

-  3380 

+  36083 

d 

+  13257 

-47454 

e 

+ 10828 

-13724 

e 

+ 16058 

—  3660 

f 

+  29382 

-  9528 

f 

+ 16063 

-11389 

e 

+  34110 

-  3340 

g 

+  45323 

+  32426 

h 

+  60486 
Dec.  10 

+  29049 

c 

h 

z 

+  59607 
+ 10651 

Dec.  12 

+  37180 
+  50721 

C 

827 

a 

8  7  55 

-53273 

+ 16094 

854 

a 

8  5  36 

-45199 

+  55859 

b 

- 14363 

-58638 

b 

- 16645 

-  6761 

c 

-  3596 

+ 18964 

c 

-  7926 

+  23638 

d 

-  3198 

+  39106 

d 

+  402 

+  38776 

e 

-  1560 

+  65899 

e 

+  1015 

+  21458 

£ 

-  1015 

-41402 

f 

+  26085 

-32349 

g 

+  9944 

-15180 

g 

+  39446 

-49158 

h 

+  22359 
Dec.  10 

+  14317 

H 

h 

+  45351 
Dec.  12 

-32381 
H 

832 

a 

8  22  S3 

-53S35 

+  17580 

855 

a 

8  8  36 

-45293 

+  56146 

b 

— 14684 

-57202 

b 

— 16711 

-  6466 

c 

-  3840 

+  20443 

c 

-  8028 

+  23944 

d 

-  3410 

+  40572 

d 

+  295 

+  39083 

e 

-  1769 

+  67336 

e 

+  928 

+  21752 

f 

-  1330 

-39960 

f 

+  26020 

-32053 

g 

+  9663 

-13706 

g 

+  39377 

-48833 

h 

+  22114 
Dec.  10 

+  15786 
C 

h 

+  45291 
Dec.  12 

-32050 
C 

833 

a 

8  25  54 

-53556 

+  17869 

856 

a 

8  II  54 

-45360 

+  56526 

b 

-14699 

-56838 

b 

- 16802 

—  6091 

c 

-  3886 

+  20735 

c 

-  8088 

+  24295 

d 

-  3475 

+  40874 

d 

+  227 

+  39432 

e 

-  1817 

+  67654 

e 

+  857 

+  22114 

f 

-  1342 

-39594 

f 

+  25928 

-31706 

g 

+  9628 

-13421 

g 

+  39289 

-48499 

h 

+  22048 

+  l6l02 

h 

+  45210 

-3161a 

26 


DETERMINATION   OF   THE   SOLAR   PARALLAX 
Table  I.  —  Meridian  Plate  Measures  —  Continued. 


Plate 
No. 

Stas. 

P.  S.  T. 

X 

y 

Plaie 
No. 

Star. 

P.  S.  T. 

X 

y 

Dec.  22 

H 

Dec.  24 

H 

878 

a 

7  40  36 

—  20283 

+  58426 

903 

a 

7  35  0 

-48833 

+  1451S 

b 

-  4698 

+  8852 

b 

-  29483 

-59953 

c 

+  598 

+ 18586 

c 

-30888 

-15126 

d 

+  7356 

-32581 

e 

+  4874 

-40352 

e 

+ 18190 

-91054 

f 

+  12225 

-48239 

f 

+  25730 

-36343 

g 

+  14381 

-  53460 

g 

+  25794 

-15375 

h 

+ 15564 

+  24946 

h 

+  26458 
Dec.  22 

+  31231 
C 

i 
J 

+  43450 
-  73SI 

Dec.  24 

-  4753 
-15376 

C 

880 

a 

7  46  36 

-20731 

+  59053 

904 

a 

7  38  I 

-49055 

+ 14869 

b 

-  S129 

+  9493 

b 

-29742 

-59622 

c 

+   159 

+  19219 

c 

-31122 

-14777 

d 

+  6912 

-31914 

e 

+  4619 

—  40021 

e 

+  17730 

-90383 

f 

+  11950 

-47898 

f 

+  25298 

-35693 

g 

+ 14106 

-53126 

K 

+  25354 

-14731 

h 

+  15351 

+  25261 

h 

+  26013 
Dec.  22 

+  31889 
H 

i 
J 

+  43175 
-  7606 

Dec.  24 

-  4441 
- 15034 

H 

881 

a 

7  49  S8 

—  21036 

+  59435 

906 

a 

7  44  0 

-49572 

+ 15497 

b 

-  5398 

+  9858 

b 

-30259 

-  5898s 

c 

-  124 

+ 19599 

c 

—  31620 

-14129 

d 

+  6690 

-31536 

e 

+  4134 

-39371 

e 

+  17566 

—  90006 

f 

+ I 1458 

-47241 

f 

+  25058 

-35267 

g 

+ 13628 

-52474 

K 

+  25089 

- 14340 

h 

+ 14782 

+  25975 

h 

+  2S739 
Dec.  23 

+  32270 
C 

i 

j 

+  42664 
—  8096 

Dec.  26 

-  3770 
- 14383 

C 

889 

a 

7  35  36 

-44249 

-18882 

920 

a 

7  36  0 

—  61902 

-12526 

b 

+  3737 

+  59920 

b 

+  21924 

+  27536 

c 

+  753 

-31279 

c 

+  32370 

+  35082 

d 

+ IS743 

-34117 

d 

+ 16431 

-51250 

e 

+  29938 

-38311 

e 

+  60973 

+ 15085 

f 

+  26388 

- 10475 

f 

+  68675 

-11378 

K 

+  28067 
Dec.  23 

+  23163 
H 

g 

+  66062 
Dec.  26 

-51335 
H 

890 

a 

7  38  47 

-44492 

-  X8502 

921 

a 

7  39  0 

—  62162 

— 12169 

b 

+  3500 

+  60258 

b 

+  21637 

+  27833 

c 

+  486 

-30934 

c 

+  32114 

+  35358 

d 

+ 15467 

-33788 

d 

+  16128 

-50927 

e 

+  29659 

-37975 

e 

+  6070s 

+  15410 

f 

+  26124 

-10133 

f 

+  6839s 

—  1 1090 

S 

+  27795 
Dec.  23 

+  23494 
C 

g 

+  65780 
Dec.  26 

—  51048 
C 

891 

a 

7  41  36 

-44701 

—  18209 

922 

a 

7  41  36 

-62389 

— 11894 

b 

+  3288 

+  60545 

b 

+  21395 

+  28130 

c 

+  282 

-  30628 

c 

+  31870 

+  35687 

d 

+  15259 

-33488 

d 

+  15916 

-  50603 

e 

+  29463 

-37643 

e 

+  60470 

+  15713 

f 

+  25921 

-  9838 

f 

+  68155 

-10775 

g 

+  27611 

+  23791 

g 

+  65.545 

-50716 

MERIDIAN  PLATE   MEASURES 
Plate  I.  —  Meridian  Plate  Measures  —  Continued. 


27 


Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

Plate 
No. 

Stab. 

P.  S.  T. 

X 

y 

Dec.  28 

H 

Dec.  28 

H 

930 

a 

7  26  II 

-  69930 

-  4560 

932 

a 

7  31  47 

-70519 

-  3966 

b 

-47821 

-  8858 

b 

—  48402 

-  8251 

c 

-21771 

-43130 

c 

-22350 

-42500 

d 

-18622 

—  2214 

d 

-19195 

—  1600 

e 

— 10942 

—  26940 

e 

-11504 

-  26336 

f 

+  314 

+  57093 

f 

-  266 

+  57675 

S 

+  8987 

-  79403 

g 

+  8400 

-78752 

h 

+  26858 
Dec.  28 

+  48944 

c 

h 

+  26250 

+  49524 

93  » 

a 
b 
c 
d 

e 
f 

K 
h 

7  28  52 

-70209 

-  48082 

—  22049 
- 18898 
— 11192 
+   42 
+  8749 
+  26549 

-  4293 

-  8577 
-42784 

-  1930 

-  26673 

+  S7375 
-79083 
+  49235 

28 


DETERMINATION   OF   THE    SOLAR   PARALLAX 
Table  II.  —  Meridian  Plate  Constants. 


PiATE  Constants. 

Standakd  Constants. 

Rkfhaction  Constants.     | 

Date. 

Plaie 
No. 

P 

r 

P 

r 

M, 

My,N:, 

Ny 

Oct. 

S 

84 

+.000023 

—.000082 

+.000251 

+.000003 

-f  .000257 

8S 

— 

S3 

— 

490 

252 

I 

(( 

90 

+ 

39 

+ 

525 

—.000462 

+.000650 

(( 

3 

tt 

Oct. 

6 

98 



208 



62 

248 

+      2 

254 

100 

— 

86 

— 

19s 

247 

+      I 

it 

102 

+ 

256 

+ 

262 

+.000027 

+.000402 

it 

—      I 

tt 

Oct. 

7 

no 

_ 

272 

284 

247 

0 

254 

112 

— 

388 

— 

272 

it 

—      I 

tt 

113 

- 

77 

— 

298 

H 

—      I 

tt 

Oct. 

8 

117 



82s 

+ 

2036 

243 

0 

251 

118 

— 

816 

+ 

1802 

tt 

0 

il 

119 

- 

871 

+ 

2288 

(( 

—      2 

tt 

Oct. 

9 

122 

+ 

133 

+ 

S8 

244 

+      1 

252 

123 

- 

103 

— 

281 

(t 

+      I 

tt 

I2S 

■ 

13 

+ 

220 

-.000313 

-.004054 

0 

tt 

Oct. 

lO 

129 

_ 

836 

+ 

9SI 

344 

0 

253 

130 

— 

917 

— 

681 

(( 

0 

(( 

X3I 

— 

736 

+ 

1 107 

(( 

0 

tt 

Oct. 

13 

142 

+ 

334 

+ 

477 

247 

4 

256 

143 

- 

440 

- 

388 

248 

4 

II 

144 

+ 

124 

" 

87 

—.000230 

—.001990 

a 

5 

tt 

Oct. 

13 

156 

+ 

230 

+ 

421 

24S 

+      1 

256 

157 

— 

203 

— 

203 

(( 

+      I 

l« 

160 

" 

47 

" 

224 

—  .002018 

-.002934 

tt 

—       2 

Oct. 

14 

180 

+ 

93 

_ 

30 

246 

+        2 

257 

181 

- 

67 

— 

99 

H 

+        I 

II 

182 

" 

17 

+ 

92 

—.000962 

-.000033 

tt 

0 

II 

Oct. 

IS 

204 



121 

— 

S70 

247 

+       2 

258 

205 

- 

76 

+ 

348 

(( 

+       2 

II 

207 

+ 

209 

+ 

219 

-.000334 

-.000527 

246 

0 

« 

Oct. 

i6 

232 

+ 

23 

— 

77 

244 

+        2 

256 

23s 

+ 

230 

— 

42 

(( 

0 

tt 

236 

" 

264 

+ 

120 

-.000391 

+.00236 

tt 

—        I 

If 

Oct. 

21 

2S8 

„ 

73 

+ 

993 

245 

+       1 

261 

2S9 

— 

III 

- 

421 

It 

+        I 

ft 

260 

+ 

174 

" 

49S 

-.000193 

+.000258 

tt 

0 

tt 

Oct. 

23 

272 

_ 

S73 

+ 

127 

252 

0 

270 

273 

— 

343 

+ 

619 

+.000252 

0 

+.000270 

1 

^_ 

MERIDIAN  PLATE   CONSTANTS 
Table  II.  —  Meridian  Plate  Constants  —  Continued. 


29 


Plate  Constants. 

Standard  Constants. 

Refraction  Constants.     | 

Date. 

Plate 
No. 

P 

r 

P 

r 

Mx 

My, 

Nx 

Ny 

Oct.  24 

286 

+  .000083 

+.000024 

+.000251 

.000000 

+.000269 

287 

- 

154 

+ 

233 

n 

- 

2 

(( 

288 

+ 

72 

262 

—.000914 

—.00280 

It 

3 

(( 

Oct.  25 

3" 

_ 

97 

+ 

152 

247 

+ 

3 

36s 

312 

+ 

IS 

— 

107 

it 

+ 

a 

tt 

314 

+ 

76 

39 

—.000714 

+.00197 

ti 

0 

tt 

Oct.  26 

329 

+ 

35 

— 

282 

248 

+ 

2 

267 

330 

— 

80 

+ 

4S4 

(( 

+ 

I 

i< 

331 

+ 

35 

160 

-.000417 

-.002383 

« 

0 

it 

Oct.  29 

353 

+ 

29 

+ 

177 

254 

0 

276 

354 

+ 

92 

— 

184 

it 

0 

tt 

3S5 

" 

119 

+ 

17 

-.000314 

+.000864 

It 

0 

tt 

Nov.  1 

360 

_ 

673 

+ 

2609 

250 

0 

272 

361 

- 

64 

+ 

2486 

I( 

— 

I 

tt 

362 

— 

125 

+ 

309s 

H 

— 

2 

Nov.  2 

384 

_ 

331 

+ 

9 

246 

+ 

I 

367 

38s 

- 

SI 

— 

14 

(( 

0 

(( 

386 

+ 

397 

+ 

9 

-.000551 

—.002187 

ft 

3 

II 

Nov.  3 

408 

_ 

426 



207 

245 

+ 

4 

267 

411 

+ 

69 

— 

261 

tt 

0 

tt 

414 

+ 

362 

+ 

468 

—.000207 

+.002069 

U 

3 

tt 

Nov.  4 

439 

+ 

79 

+ 

341 

247 

+ 

4 

369 

441 

— 

227 

— 

86 

tt 

+ 

3 

It 

443 

+ 

139 

— 

262 

-.000847 

—.00191 

tt 

2 

tt 

Nov.  s 

44S 

+ 

163 

_ 

137 

246 

+ 

4 

268 

447 

+ 

19 

- 

181 

tt 

+ 

3 

tt 

45° 

197 

+ 

31s 

—.000238 

+.000238 

tt 

3 

tt 

Nov.  9 

464 

_ 

92 



297 

246 

+ 

2 

268 

466 

— 

10 

— 

97 

247 

0 

269 

467 

+ 

106 

+ 

382 

-.000734 

+.000252 

248 

4 

270 

Nov.  10 

486 

_ 

119 

+ 

69 

245 

+ 

4 

268 

487 

+ 

288 

- 

61 

(( 

+ 

2 

n 

492 

~~' 

156 

■*" 

4 

'-.000933 

—.004042 

tt 

S 

267 

Nov.  12 

S18 

+ 

218 

_ 

170 

246 

+ 

4 

267 

S19 

+ 

108 

+ 

117 

It 

+ 

3 

II 

S20 

32s 

+ 

S2 

—.000656 

—  .004001 

+.00024S 

+ 

2 

+.000267 

3© 


DETERMINATION   OF   THE    SOLAR   PARALLAX 
Table  II.  —  Meridian  Plate  Constants  —  Continued. 


Plaik  Constants. 

Standard 

Constants. 

Refraction  Constants.     | 

Date. 

Plate 
No. 

P 

f 

P 

r 

M^ 

M, 

Nx 

Ny 

Nov.  13 

538 

-.000378 

+.000274 

+.000245 

+.000004 

+.000267 

S39 

+ 

i6s 

- 

260 

11 

+ 

3 

<( 

54° 

+ 

210 

" 

9 

—.000810 

+.000217 

n 

+ 

3 

(( 

Nov.  23 

S7I 

— 

163 

_ 

1044 

251 

+ 

3 

269 

S73 

— 

77 

— 

209 

U 

+ 

I 

ii 

576 

— 

20 

~" 

255 

n 

*" 

3 

it 

Nov.  24 

S8S 

- 

228 

+ 

1724 

251 

- 

3 

268 

Nov.  27 

601 

193 

246 

249 

+ 

3 

265 

602 

— 

417 

+ 

102 

M 

+ 

2 

« 

606 

+ 

607 

+ 

146 

—  .001110 

+.000717 

K 

+ 

I 

H 

Nov.  28 

627 

_ 

219 

+ 

169 

248 

+ 

2 

263 

629 

+ 

122 

— 

no 

I( 

0 

n 

630 

+ 

107 

" 

60 

+.000062 

—.00114 

ti 

0 

K 

Nov.  29 

660 

_ 

143 

+ 

239 

248 

+ 

2 

262 

661 

+ 

207 

— 

808 

(( 

+ 

I 

(( 

666 

~ 

68 

+ 

578 

+.000506 

-.004946 

(I 

2 

(( 

Dec.  2 

679 

— 

28 

_ 

i6i 

245 

+ 

2 

257 

680 

- 

44 

+ 

569 

it 

+ 

I 

H 

681 

+ 

61 

" 

404 

—.000126 

+.003284 

(( 

+ 

I 

Dec.  3 

698 

_ 

38 

_ 

259 

246 

+ 

I 

258 

699 

— 

6S 

- 

25 

(( 

+ 

1 

(( 

700 

+ 

93 

+ 

283 

—  .000661 

+  .00324 

ti 

0 

u 

Dec.  s 

72s 

+ 

179 

+ 

244 

346 

+ 

3 

255 

726 

+ 

75 

- 

371 

<( 

+ 

2 

u 

728 

245 

+ 

137 

-.000892 

-.001763 

245 

+ 

I 

(( 

Dec.  6 

7S6 

— 

319 

+ 

363 

246 

+ 

3 

255 

7S8 

+ 

87 

- 

72 

n 

+ 

2 

1( 

7S9 

+ 

213 

299 

—.000663 

+.000201 

a4S 

+ 

I 

254 

Dec.  7 

787 

+ 

27 

+ 

53 

248 

+ 

3 

256 

790 

- 

356 

+ 

409 

247 

+ 

2 

'* 

791 

+ 

3" 

482 

—.000538 

+.000647 

246 

+ 

I 

U 

Dec.  8 

821 

_ 

42 

+ 

31 

247 

+ 

I 

256 

823 

+ 

350 

+ 

lOI 

248 

0 

u 

824 

316 

126 

-.00147 

+.00171 

+.000248 

I 

+.000256 

MERIDIAN   PLATE   CONSTANTS 
Table  II.' — MERroiAN  Plate  Constants  —  Continued. 


31 


Plate  Constants. 

Standaes  Constants. 

Refkactton  Constants.            I 

Date. 

Plate 
No. 

P 

r 

P 

T 

M, 

My,N, 

Ny 

Dec.  10 

827 

_. 

000074 

+.000434 

+.000251 

+.000001 

+.000258 

832 

— 

215 

-       378 

252 

—           I 

(( 

833 

+ 

276 

67 

—  .000342 

-.000511 

253 

—             I 

tt 

Dec.  II 

847 

+ 

21 

+            4 

250 

+        I 

257 

848 

— 

67 

+          20 

ti 

+        I 

ti 

849 

+ 

SI 

32 

-.000655 

+.000336 

it 

+        I 

H 

Dec.  12 

854 

— 

48 

—        240 

251 

+       I 

m 

8SS 

— 

38 

+        168 

It 

+        I 

tt 

856 

+ 

85 

+          61 

-.001055 

+.001 1 18 

« 

0 

tt 

Dec.  22 

878 

_ 

128 

-        289 

253 

0 

25s 

880 

+ 

98 

281 

(( 

—           I 

(( 

881 

+ 

31 

+        569 

-.000457 

+  .000452 

t( 

—           I 

it 

Dec.  23 

889 

— 

167 

+        23s 

251 

+       I 

252 

890 

+ 

33 

151 

250 

0 

M 

891 

+ 

134 

70 

-.000095 

+.000250 

ft 

0 

(( 

Dec.  24 

903 

— 

78 

+        133 

250 

0 

252 

Q04 

+ 

145 

342 

n 

0 

tt 

906 

79 

+        221 

-.000397 

—.001946 

tt 

0 

tt 

Dec.  28 

930 

— 

648 

+      4347 

253 

0 

253 

931 

— 

526 

+      4743 

tt 

0 

tt 

932 

26s 

+      4423 

+.000253 

0 

+.000253 

32 


DETERMINATION   OF   THE    SOLAR  PARALLAX 


Table  III.  —  Meridian  Mean  Places,  Reduction  to  Apparent  Place,  and 

Parallax  Corrections. 


Date. 

Plate 

Berlw  M.  T. 

Mean  Place  igoo.  0. 

Reduction  to 
Appakent  Place. 

Pakallax  a. 

No. 

a 

8 

a 

8 

a 

8 

Oct.  s 

84 
8S 
90 

h  m  8 

22  28  22 
38  22 

23  8  35 

h  in   8 

2  43  48.267 
48.131 
47-771 

9       f         ff 

463s  4.07 
13-08 
40-49 

8 

+6.0S7 

+  13-02 

s 
-■09s 
—  .040 
+.126 

ft 
—2.64 
2.66 
2.62 

Oct.  6 

98 
100 
102 

22  27  50 
36  36 

23  50  41 

2  43  37-268 
37-144 
36.936 

46  56  43  03 

50.88 

57  4-01 

6.107 

13-19 

-.077 
-.028 
+-05 1 

2.78 
2.80 
2-79 

Oct.  7 

no 

112 

"3 

22  31  22 

43  46 
46  59 

2  43  22.375 
22.145 
22.107 

47  18  13-96 
24.99 
27-93 

6.158 

13-39 

—034 
+-03  7 
+-05S 

2-93 
2-93 
2-93 

Oct.  8 

117 
118 
119 

22  29  35 
34  29 
43  35 

2  43  3.621 

3-520 
3-312 

47  39  27-25 
31-S1 
39-34 

6.208 

13-57 

—  .021 
+.008 
+.061 

3-07 
307 
3.06 

Oct.  9 

122 
123 

125 

22  20  35 
23  46 
34  22 

2  42  40.948 
40.870 
40.619 

48  0  19.45 
22.00 
31.28 

6.257 
6.258 
6.258 

13-78 

-049 
-.030 
+-033 

3.20 
3.21 
3.21 

Oct.  lo 

129 
130 
131 

22  23  18 
26  35 
29  43 

2  42  13.899 
13.814 
13.720 

48  21  6.44 

9-13 
11.91 

6.308 

14.00 

—.007 
+-013 
+-03  2 

3-35 
3-35 
3-35 

Oct.  12 

142 

143 
144 

22  38  s8 
41  40 
44  58 

2  41  6.734 
6.643 
6-538 

49  I  5590 

58.02 

2  0.68 

6.406 

14.49 

+  -147 
+-164 
+.184 

3-58 
3-57 
3-55 

Oct.  13 

156 
IS7 
160 

22  I  18 

4  50 
18  46 

2  40  28.113 

27-993 
27.486 

49  21  13.64 
16.74 
27-89 

6-453 

14-75 

—  .061 
-.038 
+■050 

3-76 
3-77 
3-77 

Oct.  14 

180 
181 
182 

21  55  22 
59  35 

22  2  29 

2  39  44.080 
43-924 
43.814 

49  40  36.77 
40.32 
42.65 

6.500 

15.02 

—  .070 

--043 

—  .024 

3-90 
3-91 
3-91 

Oct.  IS 

204 
205 
207 

21  49  46 
52  35 

22  4  35 

2  38  55546 
55-429 
54-915 

49  59  36-79 
38.99 
48-43 

6.546 

15-31 

-.077 

--OS9 

+.021 

4-04 
4-05 
4.06 

Oct.  i6 

232 

23s 
236 

21  45  22 

22  I  41 
4  36 

2  38  2.464 
1-733 
1-593 

50  18  12.27 
24.66 
26.95 

6.592 

15.64 

—  .076 
+  -034 
+-OS3 

4-19 
4.20 
4.20 

Oct.  21 

258 
259 
260 

21  24  59 
32  35 
35  46 

2  32  28.960 
28.491 
28.297 

51  43  51-59 
56.35 
58-65 

6-799 

17-38 

-.047 
+.008 
+.032 

4.90 
4.91 
4.91 

Oct.  23 

272 
273 

21  20  23 
23  37 

2  29  44.270 
44.069 

52  14  7.68 
9.69 

'6.869 

18.19 

—  .004 
+.021 

5-19 
5-18 

Oct.  24 

286 
287 
288 

21  16  43 
25  58 
28  58 

2  28  15.653 

15-003 
14-782 

52  28  16.26 
21.31 
23.22 

6.901 

18.62 

+.010 
+  .081 
+■104 

5-32 
5-31 
5-30 

Oct.  25 

3" 
312 

314 

20  56  43 
59  18 

21  II  33 

2  26  44.201 
44.020 
43.112 

52  41  33.10 
34-78 
41-37 

-f6.93i 

+  19.06 

—.104 
-.084 
+.012 

5-43 

5-44 

-5-45 

MERIDIAN   MEAN  PLACES 


3S 


Table  III.  —  Meridian  Mean  Places,  Reduction  to  Apparent  Place,  and 
Parallax  Corrections  —  Continued. 


Date. 

Plate 

Berlin  M.  T. 

Mean  Place  igoo.  0. 

Reduction  to 
Apparent  Place. 

Parallax  A. 

No. 

a 

8 

a 

s 

a 

s 

Oct.  26 

329 
330 
331 

h  m   s 

20  55  46 
58  35 

21  I  41 

h  m   s 

2  25  7.501 
7.290 
7-053 

0   /    // 

52  54  17-19 
18.49 
19.96 

s 
+6-957 

+  19.60 

s 

—  .069 
-.047 

—  .022 

-5-57 
5-58 
5-S8 

Oct.  29 

3S3 
354 
355 

20  45  II 
48  II 
SI  18 

2  19  56.482 
56.230 
55-965 

S3  27  43-45 
44-89 
46.10 

7.021 

20.92 
20.92 

20.93 

—  .019 
+  .005 
+  -03 1 

5-95 
5-95 
5-95 

Nov.  I 

360 
361 
362 

20  32  35 
35  58 
38  43 

2  14  18.466 
18.184 
17.924 

S3  53  33-44 
34-42 
3S-33 

7-058 

22.41 

+.021 
+  .051 
+  -074 

6.28 
6.27 
6.27 

Nov.  2 

384 
385 
386 

20  19  22 
22  46 
30  29 

2  12  21.899 

21-594 

20.89s 

54  0  19.98 
20.72 
22.91 

7-064 

22.92 

—  .042 
-.013 
+-05  5 

6.37 
6.38 

6.37 

Nov.  3 

408 
411 
414 

20  3  35 
16  41 
29  50 

2  10  23.699 
22.480 
21.258 

54  6  10.57 
13-58 
16.53 

7.06s 

23-44 

-.130 
-.014 
+.101 

6.44 
6-47 
6.46 

Nov.  4 

439 
441 

443 

19  57  35 

20  4  36 
17  58 

2  8  23.140 

22.459 
21.194 

54  II  6.94 

8.23 

10.89 

7.064 

23.96 
2396 
23-97 

-.132 
—  .069 
+.050 

6-53 
6-55 
6.56 

Nov.  s 

445 
447 
450 

19  52  35 
58  35 

20  17  29 

2  6  21.240 
20.666 
18.890 

54  IS  5-45 
6.26 
9.28 

7-°S9 

24.48 

-.124 
-.071 
+.100 

6.61 
6.63 
6.63 

Nov.  9 

464 
466 
467 

19  34  29 
42  23 
56  29 

I  s8  8.638 
7-915 
6-573 

54  21  0.98 
1.07 
0.44 

7.004 

26.53 

--075 
—  .001 

+.131 

6.90 
6.91 
6.89 

Nov.  10 

486 
487 
492 

19  23  35 
30  35 
S3  35 

I  56  6.830 
6.177 
4.019 

54  19  57-49 
57-10 
SS-83 

6.983 

27.04 

—  .122 
-.056 
+.160 

6-93 
6-95 
6.91 

Nov.  12 

518 

519 
520 

19  9  36 
12  58 
IS  41 

I  52  6. no 
5-798 
5-523 

54  14  45-44 
45-32 
44-51 

6.932 
6.931 
6.931 

28.03 

-.144 
—  .112 
-.086 

6.99 
7.01 
7.02 

Nov.  13 

538 
539 
540 

19  2  58 
5  35 
8  35 

I  50  8.314 
8.072 
7.8n 

54  10  36.62 
36.25 
35-55 

6.901 

28.50 

-.152 
-.127 
-.098 

7.02 
7-03 
7.04 

Nov.  23 

571 
573 
576 

18  15  II 
II  22 
31  29 

I  33  42.968 
42.572 
41.322 

52  35  5-52 

1.97 

34  50.03 

6.501 

32.49 

-.176 

-IIS 
+.083 

6.83 
6.8s 
6.82 

Nov.  24 

588 

18  30  26 

I  32  29.561 

52  20  16.01 

6.456 

32.80 

+•123 

6-74 

Nov.  27 

601 
602 
606 

17  51  29 
54  28 

18  6  36 

I  29  32.819 
32.678 
32-156 

SI  32  24.60 
22.65 
13-78 

6-325 

33-56 

--115 
-.086 

+•033 

6.49 
6.50 
6.51 

Nov.  28 

627 
629 
630 

17  49  18 
55  28 
58  29 

I  28  46.100 
45-857 
45-71S 

51  14  55-78 
S1-17 
48.98 

+6.283 

+33-78 

—  .090 

-.030 

.000 

6.40 

6.41 

—6.41 

34 


DETERMINATION   OF   THE   SOLAR   PARALLAX 


Table  III.  —  Meridian  Mean  Places,  Reduction  to  Apparent  Place,  and 
Parallax  Corrections  —  Continued. 


Date. 

Plate 

Berun  M.  T. 

Mean  Place  1900.  0. 

Reduction  to 
Apparent  Place. 

Parallax  A. 

No. 

a 

8 

a 

8 

a 

8 

Nov.  29 

660 
661 
666 

h      m      s 

17  44   29 
47    29 

18  2  43 

h    m       s 
I  28     6.042 

5-937 
5.401 

0    /     // 
so  56  50.04 
47.68 
36.14 

s 
+6.241 

+33-97 

s 
-.092 
-.063 
+.086 

—6.29 
6.30 
6.29 

Dec.    2 

679 
680 
681 

17  31  58 
34  35 
37  36 

I  26  45.908 
45836 
45-782 

49  58  58.16 
56.09 
53-57 

6.122 

34-44 

-.085 
—  .060 
-.031 

5-93 
5-94 
5-94 

Dec.    3 

698 
699 
700 

17  29  35 
32  35 
35  35 

I  26  32.552 

32-543 
32.472 

49  38  34.61 

32.31 
29.66 

6.085 

34-54 

-.068 

-•039 
—.010 

5.80 
5-81 
5-8i 

Dec.    5 

725 
726 
728 

17   "   35 
14  46 

20  35 

I  26  26.191 
26.163 
26.120 

48  56  33-87 
3°-94 
25.80 

6.014 

34-72 

-.163 
-•133 
-.077 

S-48 
5-49 
5-51 

Dec.    6 

756 
7S8 
759 

17     8  35 
14  46 

17  35 

I  26  32.899 
32.867 
32.854 

48  34  49-01 
43-46 
40.80 

5.981 

34-77 

-•155 

—  .096 

—  .070 

5-33 
5-36 
5-36 

Dec.    7 

787 
790 
791 

17     4  35 
13  35 
16  35 

I  26  46173 
46.208 
46.202 

48  12  40.17 
31.62 
29.10 

5-949 

34-82 

-•157 
-.072 

-•043 

S.18 

5-21 

5.22 

Dec.    8 

821 
823 
824 

17  14  3° 
20  35 
23  35 

I  27     6.125 
6.166 
6.187 

47  49  55-39 
49-41 
46.74 

5-919 

34-84 

—  .029 
+.029 
+•05  7 

5.06 
5.06 
S-05 

Dec.  10 

827 
832 
833 

17     I  29 
16  28 
19  29 

I  28     5.223 
5-474 
5-Sii 

47    3  54-55 
40.22 
37.06 

5-862 

34.80 

-.086 

+•054 
+.083 

4.71 
4-72 
4-71 

Dec.  II 

847 
848 
849 

16  58  22 

17  I  35 
4  18 

I  28  44-370 
44.441 

44-493 

46  40  22.84 
19.74 
17.02 

S-837 

34-76 

-.084 

-■054 
—  .029 

4-54 
4-54 
4-55 

Dec.  1 2 

854 
855 
856 

16  59  II 

17  2   II 
5  29 

I  29  29.896 

29-975 
30.039 

46  16  30.24 
27.24 
23-54 

5.812 

34-71 

—  .046 

—  .019 
+.012 

4-37 
4-37 
4-37 

Dec.  22 

878 
880 
881 

16  34  II 
40  II 
43  33 

I  42  31-998 
32.382 
32.612 

42    7  27-14 
20.78 

17-05 

5-643 

33-25 

-.032 
+.020 
+.050 

2.42 
2.42 
2.42 

Dec.  23 

889 
890 
891 

16  29  II 
32   22 
35  " 

I  44  20.521 
20.746 
20.922 

41  41  55-63 
52-27 
49-23 

5-633 

33-04 

-•057 
—  .029 
-.005 

2.21 
2.21 
2.21 

Dec.  24 

903 
904 
906 

16  28  35 
31  36 
37  35 

I  46  14.490 
14.702 
15-155 

41  16  15.80 

12.59 
6.06 

5-623 

32-80 

-.044 
-.018 
+■033 

2.00 
2.01 
2.01 

Dec.  28 

930 
931 
932 

16  19  46 

22   27 
25   22 

I  54  38-159 
38.375 
38.643 

39  33  19-88 
17.06 
13-88 

+S-596 

+31-68 

--05s 
--033 
-.008 

1. 17 

1. 17 

-1. 18 

MERIDIAN   TRUE   PLACES   AND   CORRECTIONS   TO   EPHEMERIS 
Table  IV.  —  Meridian  True  Places  and  Corrections  to  Ephemeris. 


35 


Date. 


Oct.  s 


Oct.  6 


Oct.  7 


Oct.  8 


Oct.  9 


Oct.  lo 


Oct.  12 


Oct.  13 


Oct.  14 


Oct.  IS 


Oct.  i6 


Oct.  21 


Oct.  23 


Oct.  24 


Oct.  25 


Plate 
No. 


8S 
90 

98 
100 
102 

no 
112 
"3 

117 
118 
119 

122 
123 

125 

129 
130 
131 

142 

143 
144 

156 

IS7 
160 

180 
181 
182 

204 
205 
207 

232 

236 

258 

259 
260 

272 
273 


286 
287 
288 

311 
312 

314 


Berlin  M.  T. 


22  28  22 
38  22 

23  8  3S 

22  27  50 
36  36 
5°  41 

22  31  22 
43  46 
46  59 

22  29  35 
34  29 

43  35 

22  20  3S 
23  46 

34  22 

22  23  18 
26  35 
29  43 

22  38  58 
41  40 

44  58 

22  I  18 

4  50 
18  46 

21  55  22 

59  35 

22  2  29 

21  49  46 

52  35 

22  4  35 

21  4S  22 

22  I  41 
4  36 

21  24  59 
32  35 

35  46 

21  20  23 
23  37 


21  16  43 
25  58 
28  58 

20  56  43 
59  18 

21  II  33 


Observed. 


2  43  54229 
54.148 
53-954 

2  43  43- 298 
43223 
43094 

2  43  28.499 
28.340 
28.320 


2  43 


9.786 
9-736 
9.581 


2  42  47-156 
47.098 
46.910 

2  42  20.200 
20.135 
20.060 

2  41  13.287 

13-213 
13.128 

2  40  34.505 
34.408 
33989 

2  39  50-510 

50.381 
50.290 


238 


238 


2.015 
1. 916 

1.482 

8.980 

8.359 
8.238 


2  32  35-712 
35-298 
35-128 

2  29  51.135 
50.959 


2  28  22.564 
21.985 
21.787 

2  26  51.028 
50.867 
50-055 


46  35  14.45 

23-44 
50.89 

46  56  53.44 

57  1-27 
14.41 

47  18  24.42 

35-45 
38.39 

47  39  37-75 

42.01 

49-85 

48  o  30.03 

32.57 
41.85 

48  21  17.09 

19.78 
22.56 

49  2  6.81 

8-94 
11.62 

49  21  24.63 
27.72 
38.87 

49  40  47-89 
51-43 
53-76 

49  59  48.06 

50.25 
59-68 

50  18  23.70 

36.08 
38.37 

51  44  4.06 

8.81 
II. II 

52  14  20.68 

22.70 


52  28  29.56 
34.62 
36.54 

52  41  46.73 
48.40 
54-98 


O-E 


-055 
70 
75 

50 
46 
49 

35 
50 
33 

43 
24 
49 

68 
71 
78 

97 

95 

103 

67 
69 
67 

93 

89 

97 

82 
72 
70 

89 
92 

97 

89 
77 
85 

142 
150 
148 

143 
122 


157 
154 
161 

156 

146 

■IS3 


+  .46 
32 
36 


42 
36 
82 


62 
64 
75 

91 

86 

71 

64 
43 
56 

54 
39 
46 

31 

16 

+   08 

—  01 
+  26 

-  15 


+ 


16 
37 
39 

49 
53 
45 

42 
19 
27 

62 

44 
66 


-  03 
04 


+  36 
II 
29 

12 

37 
+  26 


36  DETERMINATION  OF  THE  SOLAR  PARALLAX 

Table  IV.  —  Meridian  True  Places  and  Corrections  to  Ephemeris  —  Continued. 


Date. 

Plate 

Berlin  M.  T. 

Observed. 

0-E 

No. 

a 

s 

a 

8 

Oct.  26 

329 
330 
331 

h  m   s 

20  55  46 
58  35 

21  I  41 

h  m   s 

2  25  14.389 
14.200 
13-987 

0   /   // 
52  54  31-22 
32-51 
3398 

s 
-.141 
143 
149 

+   -25 
13 

+   4 

Oct.  29 

353 
354 
355 

20  45  n 
48  II 
51  18 

2  20  3.484 

3-254 
3.018 

53  27  58-45 

59-88 

28  1.08 

173 
174 
171 

-  17 

0 

—  II 

Nov.  I 

360 
361 
362 

20  32  35 
35  58 
38  43 

2  14  25.545 

25-293 
25056 

53  53  49-57 
50-56 
51-47 

233 
205 
220 

42 
47 
40 

Nov.  2 

384 
38s 
386 

20  19  22 
22  46 
30  29 

2  12  28.921 
28.645 
28.014 

54  0  36.53 
37.26 

39-46 

210 

215 
203 

27 
52 
39 

Nov.  3 

408 
411 
414 

20  3  35 
16  41 

29  5° 

2  10  30.634 

29-531 
28.424 

54  6  27-57 
30-55 
3351 

251 
258 

257 

37 
37 
40 

Nov.  4 

439 
441 

443 

19  57  35 

20  4  36 

17  58 

2  8  30.072 

29-454 
28.308 

54  II  24-37 
25-64 
28.30 

210 
231 
257 

27 

31 
12 

Nov.  5 

445 
447 
450 

19  52  35 
58  35 

20  17  29 

2  6  28.175 

27.654 

26.049 

54  15  23-32 
24.11 

27-13 

218 
236 
232 

20 

28 

1 

Nov.  9 

464 
466 
467 

19  34  29 
42  23 
56  29 

1 58  15567 

14.918 

13.708 

54  21  20.61 
20.69 
20.08 

254 

225 
229 

63 
S8 
66 

Nov,  10 

486 
487 
492 

19  23  35 
30  35 
53  35 

1 56  13.691 
13.104 

11.162 

54  20  17.60 
17.19 
15.96 

210 
198 
195 

65 
70 
42 

Nov.  12 

518 

519 
520 

19  9  36 
12  58 
IS  41 

I  52  12.898 
12.617 

12.368 

54  15  6.48 
6.34 
5-52 

165 
160 

194 

72 
34 
76 

Nov.  13 

538 
539 
540 

19  2  58 
5  35 
8  35 

I  so  15.063 
14.846 
14.614 

54  10  58.10 
57-72 
57-OI 

219 
225 
210 

88 
76 
88 

Nov.  23 

571 
573 
576 

18  s  II 
II  22 
31  29 

I  33  49-293 
48.958 
47.906 

52  35  31-18 
27.61 
15-70 

204 
214 
207 

1.14 
1.12 
1.32 

Nov.  24 

588 

18  30  26 

I  32  36.140 

52  20  42.07 

200 

1.48 

Nov.  27 

601 
602 
606 

17  51  29 
54  28 

18  6  36 

1  29  39.029 
38-917 
38.514 

51  32  51.67 

49-71 
40.83 

131 
143 
129 

1.72 
1.62 
1.82 

Nov.  28 

627 
629 
630 

17  49  18 
55  28 
58  29 

I  28  52.293 
52.110 
51.998 

SI  15  2316 
18.54 
16.3s 

113 

109 

—  129 

1.86 

1.88 

-1.82 

MERIDIAN   TRUE   PLACES   AND   CORRECTIONS   TO   EPHEMERIS  37 

Table  IV.  —  Meridian  True  Places  and  Corrections  to  Ephemeris  —  Continued. 


Date. 

Plate 
No. 

Berlin  M.  T. 

Observed. 

O-E 

a 

8 

a 

8 

Nov.  29 

660 
661 
666 

h   m  s 

17  44  29 

47  29 

18  2  43 

h  m   s 

I  28  12. 191 
12.115 
11.728 

0   /    '/ 

50  57  17.72 
15-35 

3-82 

s 
-.124 
123 
119 

-1.80 
1.8s 
1.63 

Dec.  2 

679 
680 
681 

17  31  58 
34  35 
37  36 

I  26  SI.945 
51-898 
51-873 

49  59  26.67 

24-59 
22.07 

112 
129 
119 

1.79 
1.69 
1.67 

Dec.  3 

698 
699 
700 

17  29  35 
32  35 
35  35 

I  26  38.569 
38-589 
38.547 

49  39  3-35 
1.04 

38  58-39 

149 
108 
129 

1-95 
1.62 
1.70 

Dec.  s 

725 
726 
728 

17  II  35 
14  46 
20  35 

I  26  32.042 
32-044 
32-057 

4857  3-II 

0.17 

56  55-01 

132 
137 
138 

1.70 

1-79 
1.70 

Dec.  6 

756 
758 
759 

17  8  35 
14  46 
17  35 

I  26  38.725 
38.752 
38-765 

48  35  18-45 
12.87 
10.21 

109 
125 
131 

1.29 
1.20 
1.34 

Dec.  7 

787 
790 
791 

17  4  35 
13  35 
16  35 

I  26  51.965 
52-085 
52.108 

48  13  9.81 

1.23 

12  58.70 

118 
lOI 
112 

1-32 
1-57 
1.27 

Dec.  8 

821 
823 
824 

17  14  30 
20  35 
23  35 

1  27  12.01S 
12. 114 
12.163 

47  50  25.17 
19.19 
16.53 

92 

93 
93 

1-59 
1.70 
1.48 

Dec.  10 

827 
832 
833 

17  I  29 
i6  28 
19  29 

I  28  10.999 
11.390 
11.456 

47  4  24.64 

10.30 

7-15 

105 
92 

99 

1-75 
1-33 
1.67 

Dec.  II 

847 
848 
849 

16  58  22 

17  I  35 
4  18 

I  28  49.123 
50.224 
50.301 

46  40  53.06 
49.96 
47-23 

1 10 
106 
109 

1.78 
1.61 
1.63 

Dec.  12 

854 
8SS 
856 

16  59  n 

17  2  II 
5  29 

I  29  35.662 
35-768 
35-863 

46  17  0.58 

16  57-.58 

53-88 

132 
149 
14s 

1.77 

1-75 
2.14 

Dec.  22 

878 
880 
881 

16  36  II 
40  II 
43  33 

I  42  37-609 
38-045 
38-305 

42  7  57-97 
51.61 
47.88 

70 
81 
66 

1.77 
1.68 
1.88 

Dec.  23 

889 
890 
891 

16  29  II 
32  22 
35  II 

I  44  26.097 
26.350 
26.550 

41  42  26.46 
23.10 
20.06 

96 

88 

III 

1.40 
1-37 
1.34 

Dec.  24 

903 
904 
go6 

16  28  35 
31  36 
37  35 

I  46  20.069 
20.307 
20.811 

41  16  46.59 
43-38 
36.85 

64 
70 

45 

1.03 
1. 00 
1.23 

Dec.  28 

930 
931 
932 

16  19  46 
22  27 
25  22 

I  54  43-700 
43-938 
44-231 

39  33  50.43 
47-55 
44-36 

57 
76 

-  55 

1.69 

1.62 

-1.72 

38 


DETERMINATION   OF   THE   SOLAR   PARALLAX 
Table  V.  —  Parallax  Plate  Measures. 


Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

Plate 
No. 

Stas.   p.  S.  T. 

X 

y 

1900 

1900 

Oct.  6 

c 

Oct.  6 

H 

92  E. 

a 

8  28  6 

-23750 

-  9932 

104  W. 

a 

16  41  IS 

-16816 

-55508 

b 

-  24947 

+  56459 

b 

-17991 

+  10874 

c 

-21818 

+  36098 

c 

-14871 

-  9496 

d 

-  696s 

+  48090 

d 

-   31 

+  2510 

e 

+  1 866 

+  359 

e 

+  8834 

-45206 

f 

+  736s 

-  29469 

f 

+ 14356 

-  75036 

K 

+ 13548 

+  70261 

e 

+  20519 

+  24672 

h 

+  31233 

-  2758 

h 

+  38216 

-48336 

i 

+  49637 

+  33142 

i 

+  56614 

-12450 

1 

+  17529 

-59661 

n 

+  3722 

+  70220 

m 

-33519 
Oct.  6 

—40410 
c 

0 

-32036 
Oct.  6 

+  64657 
C 

93  E- 

a 

8  31  0 

-  2369s 

-  I020S 

los  W. 

a 

16  46  12 

— 16710 

-5S952 

b 

-  2489s 

+  56155 

b 

-17936 

+ 10415 

c 

-21770 

+  35785 

c 

— 14812 

-  9942 

d 

—  6922 

+'47800 

d 

+   29 

+  2066 

e 

+  1879 

+   59 

e 

+  8923 

-45656 

t 

+  7389 

-29723 

f 

+  14460 

-  75464 

K 

+ 13584 

+  69969 

g 

+  20566 

+  24248 

h 

+  31255 

-  3021 

h 

+  38323 

-48740 

i 

+  49666 

+  32883 

i 

+  56702 

-12839 

1 

+  17544 

-  59905 

n 

+  3733 

+  69790 

m 

-3348s 
Oct.  6 

-40686 
H 

0 

-31998 
Oct.  6 

+  64136 
H 

94  E. 

a 

S  33  47 

-  23690 

- 10488 

106  W. 

a 

16  50  0 

-16632 

-56328 

b 

-  24884 

+  55905 

b 

-17822 

+ 10046 

c 

-21754 

+  35530 

c 

-14714 

-  10336 

d 

-  6903 

+  47537 

d 

+   96 

+  1686 

e 

+  1930 

—  192 

e 

+  8988 

—  46044 

f 

+  740s 

-30024 

f 

+ 14504 

-  75888 

g 

+ 13603 

+  69717 

g 

+  20644 

+  23854 

h 

+  31310 

-  3274 

h 

+  38374 

-49146 

i 

+  49744 

+  32633 

i 

+  56766 

-13251 

1 

+  17587 

—  60201 

n 

+  3831 

+  69402 

m 

-33464 
Oct.  6 

—  40960 
H 

0 

-31932 
Oct.  6 

+  63802 
H 

9SE. 

a 

8  43  0 

-23581 

-1 1334 

107  W. 

a 

16  59  35 

— 16490 

-57097 

b 

-  24780 

+  54976 

b 

-17710 

+  9210 

c 

-21651 

+  34628 

c 

- 14580 

-11144 

d 

-  6810 

+  46631 

d 

+  238 

+  883 

e 

+  2016 

—  1076 

e 

+  913s 

-46834 

f 

+  7518 

-  30884 

f 

+ 14650 

-76632 

g 

+ 13693 

+  68759 

g 

+  20750 

+  23068 

h 

+  31373 

-  4213 

h 

+  3849s 

-49910 

i 

+  49777 

+  31645 

i 

+  5688s 

— 14012 

1 

+  17682 

-61048 

n 

+  3915 

+  68588 

m 

-33351 
Oct.  6 

-41792 
C 

0 

-31805 
Oct.  6 

+  62986 
H 

96  E. 

a 

8  46  I 

-23524 

-11618 

108  W. 

a 

17  3  12 

- 16530 

-57489 

b 

-  24705 

+  54737 

b 

—  17684 

+  8931 

c 

—  21607 

+  34361 

c 

- 14583 

-11494 

d 

-  6747 

+  46364 

d 

+  280 

+  570 

e 

+  2029 

-  1383 

e 

+  9117 

-47238 

f 

+  7553 

-31162 

f 

+ 14626 

-  77054 

g 

+  13778 

+  68528 

g 

+  20841 

+  22722 

h 

+  31366 

-  4479 

h 

+  38481 

-  50343 

i 

+  49840 

+  31435 

i 

+  56910 

-14416 

1 

+  17718 

-61321 

n 

+  4048^ 

+  68260 

m 

-33286 

-42091 

0 

-31693': 

+  62693 

PARALLAX   PLATE   MEASURES 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


39 


Plate 
No. 

Stak. 

P.  S.  T. 

X 

y 

Plate 
No. 

Stak. 

P.  S.  T. 

X 

y 

1900 

1900 

Oct.  12 

H 

Oct.  12 

c 

134  E. 

a 

7  26  II 

-53028 

+  58451 

140  E. 

a 

7  57  5 

—  52221 

+  55699 

b 

-31659 

+  59761 

b 

-30858 

+  570IO 

c 

-22826 

+  33403 

c 

—  21996 

+  30643 

d 

-19314 

-15688 

d 

-18452 

— 18420 

e 

+  2268 

+  34722 

e 

+  3048 

+  32018 

f 

+  8391 

-31184 

f 

+  9247 

-33927 

g 

+  S7342 

+  45932 

g 

+  58176 

+  43299 

m 

+  7497 

-51274 

m 

+  8391 

-53911: 

n 

+  41287 
Oct.  12 

-63240 
C 

n 

+  42190 
Oct.  12 

-65897 
C 

13s  E. 

a 

7  28  58 

-52948 

+  58274 

145  w. 

a 

16  40  0 

-35955 

+  10896 

b 

-31585 

+  59559 

b 

-14586 

+  12204 

c 

—  22770 

+  33177 

c 

-  5734 

-14182 

d 

-19207 

-15909 

d 

-  2094 

-63248 

e 

+  2329 

+  34494 

e 

+  19339 

-12812 

f 

+  8458 

-31440 

f 

+  25582 

-78717 

g 

+  57418 

+  45693 

g 

+  74SOO 

-  1556 

m 

+  7600 

-51450 

0 

-52839 

+  25018 

n 

+  41368 
Oct.  12 

-63452 
H 

■^ 

P 

+  56000 
Oct.  12 

+  52500 
H 

136  E. 

a 

7  32  35 

-52780 

+  57890 

146  w. 

a 

16  43  42 

-35834 

+  IOS73 

b 

-31426 

+  59221 

b 

- 14447 

+  11897 

c 

—  22614 

+  32802 

c 

-  5584 

- 14499 

d 

- 19042 

— 16226 

d 

-  1998 

-63541 

e 

+  2479 

+  34175 

e 

+ 19472 

-13137 

f 

+  8596 

-31728 

f 

+  25712 

-7899s 

g 

+  57592 

+  45402 

g 

+  74638 

-  1863 

m 

+  7765 

-51711 

0 

-52701 

+  24709 

n 

+  41517 
Oct.  12 

-63756 
C 

P 

+  56154 
Oct.  12 

+  52230 
C 

137  E. 

a 

7  40  8 

-52708 

+  57170 

147  w. 

a 

16  51  47 

-35594 

+  9939 

b   1 

-31326 

+  58474 

b 

-14207 

+  11268 

c 

-  22499 

+  32116 

c 

-  5356 

-15146 

d 

-18884 

- 16908 

d 

—  1706 

-64243 

e 

+  2585 

+  33460 

e 

+  19714 

-13779 

f 

+  881S 

-32410 

f 

+  25933 

-79710 

g 

+  57683 

+  44766 

g 

+  74908 

-  2509 

m 

+  7966 

-52385 

0 

-52459 

+  24082 

n 

+  41750 
Oct.  12 

-  64393 
H 

P 

+  56394 
Oct.  12 

+  51564 
C 

138  E. 

a 

7  44  8 

-52532 

+  56868 

148  w. 

a 

16  57  47 

-35414 

+  9465 

b 

-3"49 

+  58144 

b 

— 14014 

+  10774 

c 

-22358 

+  31794 

c 

-  5169 

-15646 

d 

-1879s 

-17246 

d 

-  1562 

-64714 

e 

+  2695 

+  33102 

e 

+ 19904 

-14286 

f 

+  8917 

-32761 

f 

+  26103 

—  80193 

g 

+  57825 

+  44380 

g 

+  75062 

-  3048 

m 

+  8063 

-52761 

0 

-52244 

+  23623 

n 

+  41852 
Oct.  12 

-64775 
C 

P 

+  56572 
Oct.  13 

+  51063 
H 

139  E. 

a 

7  S3  25 

-52359 

+  56000 

150  E. 

a 

7  15  9 

—  66916 

-  13962 

b 

-30986 

+  57264 

b 

— 66111 

+  32710 

c 

-22131 

+  30924 

c 

-23778 

+  55646 

d 

-18551 

- 18059 

d 

-  738s 

-28782 

e 

+  2938 

+  32236 

e 

+   326 

+  44700 

f 

+  9148 

-33582 

f 

+  9106 

-  1792 

g 

+  58032 

+  43519 

g 

+  13816 

+  31440 

m 

+  8317 

-53563 

h 

+ 14936 

+  67479 

n 

+  42114 

-65552 

m 
n 

-31252 
+  6964 

-47638 
—  60620 

40 


DETERMINATION   OF   THE    SOLAR   PARALLAX 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


Plate 

No. 

Star. 

P.  S.  T. 

X 

y 

Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

1900 

1900 

Oct.  13 

c 

Oct.  13 

H 

iSi  E. 

a 

7  19  23 

-66771 

-14379 

i6sW. 

a 

16  53  20 

-47698 

—  62921 

b 

-65981 

+  32329 

b 

-46861 

— 16206 

c 

-23784 

+  55151 

c 

-  4574 

+  6632 

d 

-  7252 

-29105 

d 

+  11982 

-77664 

e 

+   353 

+  44226 

e 

+  19516 

-  4308 

f 

+  9233 

—  2165 

f 

+  28449 

-  50706 

g 

+  13863 

+  30950 

g 

+  33112 

-17571 

h 

+ 14987 

+  67001 

h 

+  34206 

+  18489 

m 

-31139 

—  48042 

0 

-49618 

+  38556 

n 

+  7077 
Oct.  13 

—  60972 

H 

P 

+  71122 
Oct.  13 

+  22029 
C 

152  E. 

a 

7  21  S8 

-66746 

-14658 

166  W. 

a 

17  I  0 

-47376 

-63508 

b 

-65956 

+  32070 

b 

-46571 

-16798 

c 

—  23670 

+  54922 

c 

-  4301 

+  6008 

d 

-  7190 

—  29410 

d 

+ 12202 

-  78205 

e 

+   434 

+  43952 

e 

4-  19809 

-  4918 

f 

-  9310 

-  237s 

f 

+  28684 

-51250 

g 

+  13970 

+  30750 

K 

+  33324 

-1815s 

h 

+  15064 

+  66710 

h 

+  34469 

+ 1 7890 

m 

-31070 

-48312 

0 

-49304 

+  37992 

n 

+  7174 
Oct.  13 

—  61265 
C 

P 

+  71389 
Oct.  13 

+  21395 
H 

IS3  E. 

a 

7  35  9 

-66346 

-15798 

167  W. 

a 

17  3  58 

-47244 

-63722 

b 

-65532 

+  30940 

b 

-46424 

-  16936 

c 

-23312 

+  53793 

e 

-  4214 

+  5816 

d 

-  6818 

-30541 

d 

+  12372 

-  78404 

e 

+  822 

+  4289s 

e 

+ 19922 

-  5134 

f 

+  9698 

-  3552 

f 

+  28816 

-51462 

g 

+  1431S 

+  29654 

g 

+  33429 

-18379 

h 

+ 15468 

+  65668 

h 

+  34596 

+  1763 1 

m 

-30702 

-49450 

0 

—  49208 

+  37751 

n 

+  7532 
Oct.  13 

-6237s 
H 

P 

+  71499 
Oct.  13 

+  21186 
C 

163  W. 

a 

16  46  58 

-47873 

-62442 

168  w. 

a 

17  12  0 

—  47028 

-64338 

b 

-47090 

-15692 

b 

—  46210 

-17631 

c 

-  4793 

+  7133 

c 

-  3965 

+  5147 

d 

+  11770 

-77141 

d 

+  12584 

-  79004 

e 

+  19346 

-  3784 

e 

+  20182 

-  5770 

f 

+  28257 

-50213 

f 

+  29040 

-52107 

g 

+  32883 

-17072 

g 

+  33667 

- 19039 

h 

+  33994 

+  19012 

h 

+  34839 

+ 17020 

0 

-49786 

+  39091 

0 

-48976 

+  37121 

P 

+  70917 
Oct.  13 

+  22530 
C 

P 

+  71751 
Oct.  13 

+  20559 
H 

164  W. 

a 

16  49  35 

-47764 

-62592 

169  w. 

a 

17  14  58 

—  46906 

-64637 

b 

-46974 

-15860 

b 

-46063 

-17879 

c 

-  4692 

+  6906 

c 

-  3870 

+  4909 

d 

+  H906 

-77287 

d 

+  12726 

-79256 

e 

+ 19428 

—  4010 

e 

+  20268 

-  6008 

f 

+  28371 

-50354 

f 

+  29173 

-52348 

g 

+  32968 

-17244 

g 

+  33759 

- 19300 

h 

+  34101 

+ 18783 

h 

+  34904 

+ 16749 

0 

-49719 

+  38843 

0 

-48866 

+  36841 

P 

+  71038 

+  22306 

P 

+  71794 

+  20288 

PARALLAX   PLATE   MEASURES 
Table  V.  —  Pakallax  Plate  Measures  —  Continued. 


41 


Plate 
No. 

Stak. 

P.  S.  T. 

X 

y 

Plate 
No. 

Stak. 

P.  S.  T. 

X 

y 

1900 

1900 

Oct.  14 

c 

Oct.  14 

H 

170  E. 

a 

7  29  35 

-63816 

-  6472 

175  E. 

a 

820 

-62784 

-  9280 

b 

-38984 

+  14722 

b 

-37954 

+  11926 

c 

-25504 

-33395 

c 

-24453 

-36220 

d 

—  24004 

+  29098 

d 

-22965 

+  26276 

e 

-18286 

4-  70122 

e 

-17252 

+  67329 

f 

—  13222 

+  46950 

f 

-12188 

+  441 14 

g 

+  2266 

+  7045 

g 

+  3321 

+  4224 

h 

+  5248 

+  7299s 

h 

+  629s 

+  70207 

i 

+  26798 

+  2496s 

i 

+  27904 

+  22150 

m 

+  56421 

+  9735 

m 

+  57496 

+  6874 

n 

+  8246 
Oct.  14 

-52208 

H 

n 

+  9270 
Oct.  14 

-55040 
C 

171  E. 

a 

7  32  3S 

-63726 

-  671S 

176  E. 

a 

8  5  15 

—  62710 

-  9569 

b 

-38858 

-  14508 

b 

-37847 

+  11671 

c 

—  25408 

-33622 

c 

-  24362 

-36489 

d 

-23878 

+  28850 

d 

-22845 

+  25983 

e 

-18154 

+  69875 

e 

-17148 

+  67027 

f 

-13104 

+  46692 

f 

-12086 

+  43825 

e 

+  2374 

+  6792 

g 

+  3425 

+  394S 

h 

+  5364 

+  72752 

h 

+  640s 

+  69907 

i 

+  26932 

+  24735 

i 

+  27968 

+  21856 

m 

+  56496 

+  9468 

m 

+  S7570 

+  6583 

n 

+  8264 
Oct.  14 

-52422 

c 

n 

+  9352 
Oct.  14 

-55313 
H 

172  E. 

a 

7  36  47 

-63593 

—  7122 

177  E. 

a 

8  14  51 

-62390 

- 10387 

b 

-38764 

+ 14100 

b 

-37529 

+ 10834 

c 

-25238 

-  34040 

c 

-24031 

-37314 

d 

-23795 

+  28462 

d 

-22541 

+  25163 

e 

1 

-18123 

+  69494 

e 

-16850 

+  66238 

f 

- 13040 

+  46313 

f 

-11794 

+  43023 

g 

+  2500 

+  6440 

g 

+  3733 

+  3133 

h 

+  5417 

+  72416 

h 

+  6691 

+  69113 

i 

+  27034 

+  24372 

i 

+  28290 

+  21049 

m 

+  56656 

+  9125 

m 

+  57906 

+  5790 

n 

+  8466 
Oct.  14 

-52799 
H 

n 

+  9677 
Oct.  14 

-56157 
C 

173  E. 

a 

7  50  8 

-63227 

-  8298 

178  E. 

a 

8  17  SI 

-62257 

-10658 

b 

-38368 

+  12943 

b 

-37427 

+  10539 

c 

-  24863 

-35182 

c 

-23928 

-37583 

d 

-  23364 

+  27304 

d 

-22413 

+  24965 

e 

-17682 

+  68291 

e 

— 16716 

+  65957 

f 

-12613 

+  45144 

f 

— 11641 

+  42785 

g 

+  2930 

+  5258 

g 

+  3854 

+  2888 

h 

+  5855 

+  71197 

h 

+  6832 

+  68842 

i 

+  27475 

+  23181 

i 

+  28428 

+  20838 

m 

+  57099 

+  7923 

m 

+  58017 

+  5568 

n 

+  8885 
Oct.  14 

-54005 
C 

n 

+  9762 
Oct.  14 

-56398 
H 

174  E. 

a 

7  53  0 

-  63083 

-  8530 

187  W. 

a 

16  37  43 

-43672 

-51907 

b 

-38243 

+  12691 

b 

-18836 

-30677 

c 

-24738 

-3S47I 

c 

-  5320 

-  78830 

d 

-23240 

+  27062 

d 

-  3834 

- 16335 

e 

-17541 

+  68119 

e 

+  1787 

+  24786 

f 

-12485 

+  44927 

f 

+  6885 

+  1546 

g 

+  3030 

+  5014 

g 

+  22417 

-38347 

h 

+  5992 

+  71014 

h 

+  25392 

+  27671 

i 

+  27592 

+  22966 

i 

+  47001 

-20427 

m 

+  57203 

+  7703 

0 

+  23181 

+  47935 

n 

+  8963 

-54282 

P 

+  23367 

+  60063 

42 


DETERAONATION   OF   THE    SOLAR  PARALLAX 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


Plate 
No. 

Stab. 

P.  S.  T. 

X 

y 

Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

1900 

1900 

Oct.  14 

c 

Oct.  14 

H 

i88  W. 

a 

16  40  48 

-43575 

-52119 

193  w. 

a 

17  10  36 

-42456 

-54431 

b 

-18734 

-30929 

b 

-17648 

-33233 

c 

-  5233 

-  79088 

c 

-  4096 

-81362 

d 

-  3739 

-16572 

d 

-  265s 

-18882 

e 

+  1908 

+  24562 

e 

+  2958 

+  22273 

f 

+  7008 

+  1305 

f 

+  8088 

-  989 

g 

+  22539 

-38576 

g 

+  23622 

-  40843 

h 

+  25504 

+  27442 

h 

+  26545 

+  25164 

i 

+  47136 

-  20638 

i 

+  48188 

— 22911 

0 

+  232S3 

+  47696 

0 

+  24304 

+  45393 

P 

+  23436 
Oct.  14 

+  59829 

H 

P 

+  24454 
Oct.  IS 

+  57548 
H 

189  W. 

a 

16  45  45 

-43364 

-52508 

195  E. 

a 

7  29  25 

-51342 

—  6426 

b 

-18542 

-31306 

b 

-36999 

+  12224 

c 

-  5008 

-  79442 

c 

- 18743 

+  6943 

d 

-  3545 

— 16961 

d 

- 18604 

+  44054 

e 

+  2079 

+  24193 

e 

-  447 

+  69025 

f 

+  7178 

+   933 

f 

+  5942 

-19455 

g 

+  22711 

-38951 

g 

+  26048 

-12347 

h 

+  25659 

+  27065 

h 

+  29977 

+  23194 

i 

+  47284 

— 21041 

i 

+  39604 

+  33080 

0 

+  23424 

+  47318 

m 

+  50278 

-23457 

P 

+  23594 
Oct.  14 

+  59444 

c 

n 

+  50473 
Oct.  IS 

-1 1343 
C 

190  W. 

a 

16  56  15 

-43008 

-53322 

196  E. 

a 

7  33  58 

-51208 

-  6782 

b 

-18173 

-32II6 

b 

-36858 

+  11850 

c 

—  4606 

—  80224 

c 

-18589 

+  6564 

d 

-  3166 

-17779 

d 

— 18440 

+  43665 

e 

+  2432 

+  23364 

e 

-  248 

+  68666 

f 

+  7560 

+    64 

f 

+  6100 

-19832 

g 

+  23100 

-39762 

g 

+  26220 

-12736 

h 

+  26034 

+  26256 

h 

+  30150 

+  22768 

i 

+  47642 

+  2I8I6 

i 

+  39777 

+  32677 

0 

+  23764 

+  46478 

m 

+  50452 

-23885 

P 

+  23954 
Oct.  14 

+  58616 

H 

n 

+  50652 
Oct.  IS 

-11757 
H 

191  w. 

a 

16  59  IS 

-42902 

-  53606 

197  E. 

a 

7  44  15 

-50875 

-  7669 

b 

- 18086 

-32412 

b 

-36503 

+ 10947 

c 

-  4536 

-80524 

c 

-18236 

+  5674 

d 

-  3096 

-18026 

d 

- 18068 

+  42806 

e 

+  2588 

+  23116 

e 

+   113 

+  67742 

f 

+  7698 

-  116 

f 

+  6449 

-20727 

g 

+  23148 

-40044 

g 

+  26591 

-13651 

h 

+  26161 

+  26004 

h 

+  30504 

+  21868 

i 

+  47784 

—  22094 

1 

+  40133 

+  31809 

0 

+  23898 

+  46221 

m 

+  50803 

-24871 

P 

+  24068 
Oct.  14 

+  58366 
C 

n 

+  51000 
Oct.  IS 

-12657 
C 

iga  W. 

a 

17  7  35 

-42556 

-54194 

198  E. 

a 

7  47  II 

-50756 

—  8009 

b 

-I77S4 

-33006 

b 

-36395 

+ 10670 

c 

-  4232 

-81138 

c 

-18121 

+  5396 

d 

-  2749 

-1866 1 

d 

-17994 

+  42520 

e 

+  2868 

+  22479 

e 

+   172 

+  67560 

f 

+  7968 

-  774 

f 

+  6574 

—  20980 

g 

+  23488 

—  40641 

g 

+  26708 

-13839 

h 

+  26438 

1+25364 

h 

+  30598 

+  21670 

i 

+  48064 

—  22696 

i 

+  40228 

+  31588 

0 

+  24211 

+  45606 

m 

+  50935 

—  24962 

P 

+  24371 

+  57756 

n 

+  51119 

-12832 

PARALLAX   PLATE   MEASURES 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


43 


Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

Plate 
No. 

Stak. 

P.  S.  T. 

X 

y 

1900 

1900 

Oct.  IS 

H 

Oct.  15 

H 

199  E. 

a 

7  54  IS 

-  S0499 

-  8491 

215  W. 

a 

16  42  43 

-29457 

-51166 

b 

-36129 

+ 10126 

b 

-15071 

-32570 

c 

-17886 

+  4837 

c 

+  3134 

-37851 

d 

-17728 

+  41950 

d 

+  3377 

-   794 

e 

+  488 

+  66907 

e 

+  21606 

+  24264 

f 

+  681S 

-21580 

f 

+  27839 

-64265 

g 

+  26944 

- 14504 

g 

+  47994 

-57213 

h 

+  30859 

+  21036 

h 

+  51934 

-21714 

i 

+  4049° 

+  30943 

1 

+  61570 

-11797 

m 

+  51166 

-25625 

0 

-17849 

+  30584 

n 

+  S1373 
Oct.  IS 

-13502 
H 

P 

-44271 
Oct.  IS 

+  23533 
C 

201  E. 

a 

8  4  43 

-S0121 

—  9408 

216  W. 

a 

16  52  24 

-2901S 

-51928 

b 

-35754 

+  9215 

b 

- 14634 

-33323 

c 

-I7SOI 

+  3926 

c 

+  3580 

-38570 

d 

-17339 

+  41030 

d 

+  3759 

-  1506 

e 

+  8s2 

+  66021 

e 

+  21982 

+  23532 

f 

+  7184 

—  22460 

f 

+  2831S 

-  64942 

g 

+ 27311 

-15379 

g 

+  48458 

-57836 

h 

+ 3123s 

+  20147 

h 

+  52383 

-22347 

i 

+  40872 

+  30060 

i 

+  61980 

-12438 

m 

+  51533 

-  26530 

0 

-17514 

+  29815 

n 

+  51733 
Oct.  IS 

- 14384 
C 

P 

-43934 
Oct.  IS 

+  22739 
H 

ao2  E. 

a 

8  7  48 

-50030 

-  9697 

217  W. 

a 

16  54  46 

-  28936 

-52104 

b 

-35650 

+  8954 

b 

-14558 

-33502 

c 

-17382 

+  3668 

c 

+  3672 

-38736 

d 

-17224 

+  40766 

d 

+  3849 

-  1680 

■ 

e 

+  948 

+  65746 

e 

+  22042 

+  23375 

f 

+  7313 

-22730 

f 

+  28391 

-65146 

g 

+  27456 

-15634 

g 

+  48523 

-  58047 

h 

+  31377 

+ 19894 

h 

+  S24SO 

-22532 

i 

+  40980 

+  29788 

i 

+  62059 

—  12626 

m 

+  51690 

-26778 

0 

-17420 

+  29658 

B 

+  518S9 
Oct.  IS 

- 14644 
H 

P 

-43808 
Oct.  15 

+  22583 
C 

213  W. 

a 

16  36  s8 

—  29684 

-  50698 

218  W. 

a 

17  2  IS 

-  28850 

-52568 

b 

-15278 

-32109 

b 

-14372 

-34002 

c 

+  2924 

-37403 

c 

+  3800 

-3933S 

d 

+  3144 

-  343 

d 

+  4122 

-  2265 

e 

+  21378 

+  24720 

e 

+  22425 

+  22735 

f 

+  27608 

-6381S 

f 

+  28438 

-65800 

g 

+  47728 

-56748 

g 

+  48612 

-58795 

h 

+  5 1696 

-21283 

h 

+  52680 

-23242 

i 

+  61338 

-11331 

i 

+  62320 

-13372 

0 

-18072 

+  31040 

0 

— 17000 

+  29170 

P 

-44478 
Oct.  IS 

+  2399s 
C 

P 

-43428 
Oct.  15 

+  22172 
H 

214  W. 

a 

16  39  S8 

-  29493 

-50973 

219  W. 

a 

17  5  46 

-28476 

-52897 

b 

-15136 

-32358 

b 

— 14110 

-34277 

c 

+  3078 

-37609 

c 

+  4080 

-39570 

d 

+  3250 

-  562 

d 

+  4281 

-  2490 

e 

+  21451 

+  24515 

e 

+  22438 

+  22528 

f 

+  27828 

—  64008 

f 

+  28798 

-65936 

g 

+  47966 

-56897 

g 

+  48956 

-58851 

h 

+  51869 

—  21404 

h 

+  52846 

-23370 

i 

+  61474 

-11468 

i 

+  62460 

- 13469 

0 

—  1 8004 

+  30789 

0 

-16959 

+  28834 

P 

—  44408 

+  23688 

P 

-43368 

+  21784 

44 


DETERMINATION   OF   THE    SOLAR   PARALLAX 
Table  V.  —  Parallax  Plate  MEAStTRES  —  Continued. 


Plate   (, 
No.    ^ 

TAR. 

P.  S. T. 

X 

y 

Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

1900 

1900 

Oct.  15 

c 

Oct.  16 

H 

220  W. 

a 

17  12  48 

—  28212 

-53419 

225  E. 

a 

7  35  15 

-  56393 

+  64620 

b 

- 13830 

-34836 

b 

-34599 

- 10488 

c 

+  4385 

-40092 

c 

-32909 

+ 12440 

d 

+  4535 

-  3045 

d 

-22439 

+  21192 

e 

+  22732 

+  22075 

e 

— 11006 

+  25855 

f 

+  29148 

-66465 

f 

-  8554 

+  71680 

e 

+  49282 

-  59340 

g 

-  3224 

+  22830 

h 

+  53170 

-23859 

h 

+  8676 

+  34062 

i 

+ 6278s 

- 13940 

i 

+  33966 

+  6302 

0 

-16738 

+  28296 

1 

+  33154 

-17150 

P 

-43124 
Oct.  IS 

+  21206 
H 

m 

+ 11981 
Oct.  16 

-39428 

c 

221  W. 

a 

17  IS  36 

—  28122 

-53641 

226  E. 

a 

7  39  58 

-56229 

+  64157 

b 

-13726 

-35042 

b 

-34410 

- 10898 

c 

+  4441 

-40324 

c 

-32732 

+ 12030 

d 

+  4656 

-  3240 

d 

-22273 

+  20802 

e 

+  22814 

+  21778 

e 

— 10820 

+  25444 

f 

+  29202 

-66684 

f 

-  8408 

+  71209 

g 

+  49327 

—  59622 

g 

-  303s 

+  22432 

h 

+  53226 

—  24166 

h 

+  8853 

+  33648 

i 

+  62818 

-14224 

i 

+  34124 

+  5946 

! 

0 

— 16622 

+  2807s 

1 

+  33337 

-17524 

P 

-43019 
Oct.  1 6 

+  21011 

c 

m 

+  12198 
Oct.  16 

-39824 

H 

323  E. 

a 

7  17  35 

-S7I02 

+  66068 

227  E. 

a 

7  46  s8 

-55874 

+  63664 

b 

-35302 

—  9022 

b 

-34176 

-1 1444 

c 

-3362s 

+ 13895 

c 

-32443 

+  1 1484 

d 

-23145 

+  22670 

d 

—  21976 

+  20246 

e 

-1172s 

+  27330 

e 

- 10540 

+  24897 

f 

-  9248 

+  73130 

f 

—  8040 

+  70593 

g 

-  3900 

+  24310 

g 

-  2746 

+  21866 

h 

-  7982 

+  355SO 

h 

+  9154 

+  33083 

i 

+  33240 

+  7798 

i 

+  34410 

+  S3I0 

1 

+  32438 

— 15660 

1 

+  33572 

-18156 

m 

+ 11298 
Oct.  16 

-37950 
H 

m 

+  12387 
Oct.  16 

—  40406 
C 

223  £• 

a 

7  21  4S 

-56832 

+  65756 

228  E. 

a 

7  49  48 

-55831 

+  63350 

b 

-35122 

-  9356 

b 

-  34046 

-11732 

c 

-33422 

+ 13594 

c 

-32344 

+  11207 

d 

-22936 

+  22344 

d 

—  21891 

+  19972 

e 

-11489 

+  26968 

e 

— 10464 

+  24653 

f 

-  9014 

+  72758 

f 

—  8041 

+  70356 

g 

-  3714 

+  23964 

g 

-  2648 

+  21607 

h 

+  8204 

+  35166 

h 

+  9243 

+  32842 

i 

+  33456 

+  7418 

i 

+  34SIO 

+  S113 

1 

+  32626 

— 16036 

1 

+  33716 

- 18346 

m 

+  11424 
Oct.  16 

-38346 
C 

m 

+  12582 
Oct.  16 

—  40680 
H 

234  E. 

a 

7  26  45 

-56753 

+  65253 

230  E. 

a 

8  0  46 

-S5402 

+  62484 

b 

-34955 

—  9820 

b 

-33648 

-12608 

c 

-33260 

+  13116 

c 

-31930 

+ 10314 

d 

—  22796 

+  21895 

d 

-21458 

+ 19070 

e 

-"355 

+  26559 

e 

— 10016 

+  23716 

f 

-  892s 

+  72320 

f 

-  7561 

+  69446 

g 

-  3557 

+  23544 

g 

-  2228 

+  20709 

b 

+  8343 

+  34774 

h 

+  9686 

+  31909 

i 

+  33619 

+  7040 

i 

+  34933 

+  4156 

1 

+  32822 

— 16411 

1 

+  34121 

-19300 

m 

+ 11663 

-38739 

m 

+  12954. 

-41592 

PARALLAX    PLATE   MEASURES 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


45 


Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

Plate 
No. 

Stak. 

P.  S. T. 

X 

y 

1900 

1900 

Oct.  16 

c 

Oct.  16 

H 

239  w. 

a 

16  52  I 

-32581 

+  20726 

244  w. 

a 

17  16  0 

-31569 

+ 18995 

b 

— 10702 

-  54395 

b 

-  9700 

-56110 

c 

-  9017 

-31462 

c 

-  8013 

-33204 

d 

+  1452 

—  22692 

d 

+  2446 

-  24437 

e 

+  12871 

- 18060 

e 

+  13877 

-19817 

f 

+  IS335 

+  27773 

f 

+  16321 

+  26000 

g 

+  20698 

-21075 

g 

+  21676 

-22812 

h 

+  32622 

-  9858 

h 

+  33595 

— 11617 

i 

+  57895 

-37560 

i 

+  58848 

-39323 

n 

-29526 

+  35552 

n 

-28527 

+  33806 

0 

+  4322 
Oct.  16 

+  52015 

H 

0 

+  5334 
Oct.  21 

+  50235 
H 

240  W. 

a 

16  56  12 

-32404 

+  20434 

247  E. 

a 

740 

-60038 

+  57028 

b 

-10541 

-  54708 

b 

-42946 

+  34873 

c 

-  8858 

-31779 

c 

-31879 

+ 10650 

d 

+  1619 

-23021 

d 

-21639 

+  87954 

e 

+ 13054 

- 18380 

e 

-16573 

- 18788 

f 

+  15513 

+  27479 

f 

+  9500 

-15274 

g 

+  20859 

-21381 

g 

+  21955 

+  23472 

h 

+  32790 

— 10169 

h 

+  31507 

+  15277 

i 

+  58052 

-37877 

1 

+  40563 

-18258 

n 

-29355 

+  35272 

m 

+  42979 

-34095 

0 

+  4521 
Oct.  16 

+  51722 
C 

Oct.  21 

C 

241  w. 

a 

17  I  0 

-32212 

+  20067 

248  E. 

a 

7  6  36 

-  59909 

+  56820 

b 

- 10305 

-  55060 

b 

-42834 

+  34686 

c 

-  8636 

-32134 

c 

-31745 

+ 10448 

d 

+  1841 

-  23366 

d 

-21545 

+  87740 

e 

+ 13264 

-18732 

e 

— 16419 

- 18964 

f 

+  15702 

+  27100 

f 

+  9654 

-15453 

g 

+  21097 

—  21726 

g 

+  22086 

+  23335 

h 

+  32998 

-10518 

h 

+  31640 

+  15143 

i 

+  58267 

-38230 

y 

+  46556 

-68713 

n 

-29171 

+  34895 

1 

+  40723 

-18417 

0 

+  46S8 
Oct.  16 

+  51347 
H 

m 

+  43149 
Oct.  21 

-34223 

c 

242  w. 

a 

17  7  8 

-31943 

+  19624 

250  E. 

a 

7  19  51 

-59214 

+  55848 

b 

-10088 

-55511 

b 

-42124 

+  33716 

c 

—  8404 

-32565 

c 

-31043 

+  9482 

d 

+  2086 

-23828 

d 

-  20859 

+  86822 

e 

+  13522 

-19179 

e 

-15731 

- 19944 

f 

+ 15949 

+  26622 

f 

+ 10355 

- 16438 

g 

+  21318 

—  22187 

g 

+  22772 

+  22345 

h 

+  33224 

-  1099s 

h 

+  32319 

+ I4I66 

i 

+  58492 

-38693 

y 

+  47233 

—  69700 

n 

-  28866 

+  34437 

1 

+  41410 

-19378 

0 

+  4967 
Oct.  16 

+  50859 
C 

n 

+  43831 
Oct.  21 

-3520s 

H 

243  w. 

a 

17  10  8 

-31831 

+ 19415 

251  E. 

a 

7  25  43 

-58920 

+  55473 

b 

-  9967 

-55745 

b 

-41838 

+  33337 

c 

-  8278 

-32806 

c 

-30759 

+  9084 

d 

+  2226 

—  24046 

d 

-20515 

+  86385 

e 

+ 13648 

- 19404 

e 

-15434 

-20351 

f 

+ 16085 

+  26418 

f 

+ 10656 

-16842 

g 

+  21448 

-22381 

g 

+  23079 

+  21917 

h 

+  33392 

-11182 

h 

+  32636 

+  13732 

i 

+  58664 

-38910 

1 

+  41694 

— 19824 

n 

-28766 

+  34241 

m 

+  44124 

-35650 

0 

+  5094 

+  5067s 

46 


DETERMINATION   OF   THE    SOLAR   PARALLAX 


Table  V.  —  Parallax  Plate  Measures  —  Continued. 


PlAIE 

No. 

Stab. 

P.  S. T. 

X 

y 

Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

1900 

1900 

Oct.  21 

c 

Oct.  21 

H 

252  E. 

8 

7  29  23 

-58728 

+  55180 

266  W. 

.a 

16  45  25 

-27184 

+  17682 

b 

-41636 

+  3304s 

b 

—  10076 

-  4465 

c 

-30572 

+  8793 

c 

+  1022 

-28715 

d 

-  20333 

+  86109 

d 

+  11166 

+  4863s 

e 

-15267 

—  20630 

e 

+ 16363 

-58118 

f 

+ 10833 

-17133 

f 

+  42420 

—  54620 

g 

+  23287 

+  21622 

g 

+  54860 

-15852 

h 

+  32835 

+ 13446 

h 

+  64378 

—  24040 

1 

+  41891 

—  20102 

n 

-  38098 

+  65254 

m 

+  44301 
Oct.  21 

-35934 

H 

0 

z 

+  24177 
-35976 

Oct.  21 

+  61574 
+  35801 

C 

2S3E. 

a 

7  36  51 

-58331 

+  54631 

267  w. 

a 

16  54  0 

—  26712 

+  17149 

b 

-41240 

+  32480 

b 

-  9584 

-  5012 

c 

-3015s 

+  8230 

c 

+  1501 

-29236 

d 

-  I99SS 

+  85566 

d 

+ 11651 

+  48092 

e 

- 14826 

-21183 

e 

+ 16846 

-58660 

f 

+  11274 

— 17664 

f 

+  42932 

-55145 

e 

+  23666 

+  21113 

g 

+  55325 

-16376 

h 

+  33222 

+ 12920 

h 

+  64857 

-24561 

1 

+  42290 

—  20624 

n 

-37612 

+  64715 

m 

+  44726 
Oct.  21 

-36438 
C 

0 

z 

+  24673 
-35518 

Oct.  21 

+  61040 
+  35294 

H 

254  E. 

a 

7  40  I 

-58166 

+  54397 

268  w. 

a 

16  56  15 

-26530 

+ 16998 

b 

— 41081 

+  32247 

b 

-  9454 

-  5154 

c 

-  29997 

+  8022 

c 

+  1638 

-  29396 

d 

-19799 

+  85317 

d 

+  11788 

+  47961 

e 

— 14684 

— 21411 

e 

+ 17000 

-58804 

f 

+  11410 

-17888 

f 

+  43042 

-55289 

g 

+  23834 

+  20873 

g 

+  SS4I2 

—  1 65 1 2 

h 

+  33387 

+ 12684 

h 

+  65010 

—  24706 

1 

+  42471 

-  20868 

n 

-37475 

+  64544 

m 

+  44895 
Oct.  21 

-36687 
H 

0 

z 

+  24768 
-35348 

Oct.  21 

+  60901 
+  351" 

C 

264  W. 

a 

16  39  36 

-  27494 

+ 18036 

269  w. 

a 

17  5  8 

—  26105 

+ 16457 

b 

— 10380 

—  4116 

b 

-  897s 

-  5691 

c 

+   70s 

-  28342 

c 

+  2132 

—  29921 

d 

+ 10845 

+  48970 

d 

+  12264 

+  47441 

e 

+ 16037 

-57778 

e 

+ 17480 

-  59346 

f 

+  42116 

-54272 

f 

+  43561 

-55854 

g 

+  54568 

-15457 

g 

+  55965 

—  1 706 1 

h 

+  64053 

-23672 

h 

+  65501 

-25261 

n 

-38423 

+  65603 

n 

-37007 

+  64067 

0 

+  23869 
Oct.  21 

+  61911 
C 

0 

+  25300 
Oct.  21 

+  60401 
H 

26s  W. 

a 

16  42  25 

-27326 

+ 17836 

270  w. 

a 

17  7  55 

-25948 

+ 16267 

b 

— 10218 

-  4298 

b 

-  8844 

-  5870 

c 

+  836 

—  28540 

c 

+  2283 

-30124 

d 

+  11014 

+  48744 

d 

+  12421 

+  47253 

e 

+ 16164 

-57974 

e 

+  1 7610 

-59545 

f 

+  42236 

-54467 

f 

+  43682 

-  56040 

g 

+  54632 

-15691 

g 

+  56082 

-17246 

h 

+  64200 

-  23868 

h 

+  65624 

-25442 

n 

-38244 

+  65426 

n 

-36870 

+  63848 

0 

+  24047 

+  61736 

0 

+  25429 

+  60158 

PARALLAX  PLATE  MEASURES 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


47 


Plate 
No. 

Star. 

P.  S. T. 

X 

y 

Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

1900 

1900 

Oct.  21 

c 

Oct.  24 

H 

271  W. 

a 

17  14  48 

-25569 

+  15870 

278  E. 

a 

7  21  24 

-74013 

— 10498 

b 

-  8446 

-  6288 

b 

-55584 

+  49534 

c 

+  2646 

-30528 

c 

-47860 

-  4956 

d 

+  12784 

+  46840 

d 

— 41196 

-34616 

e 

+ 18002 

-  59948 

e 

— 16460 

+  33136 

f 

+  44068 

-56428 

f 

-14452 

+ 16506 

g 

+  56476 

— 17646 

g 

— 10860 

+  52787 

h 

+  66006 

-25842 

h 

+  3790 

+  34142 

n 

-36453 

+  63445 

i 

+ 16914 

-17795 

0 

+  2S793 
Oct.  24 

+  S9780 
c 

j 
1 
m 

+  25397 
+  4S392 
+  40091 

Oct.  24 

+  15731 
-53942 
—  23692 

c 

27s  E. 

a 

7  7  20 

-74765 

-  9598 

291  W. 

a 

16  28  S3 

-38916 

—  42962 

b 

-56412 

+  50404 

b 

-  20459 

+  17130 

c 

-48705 

—  4060 

c 

-12754 

-37427 

d 

—  42018 

-33700 

d 

-  6035 

-67086 

e 

-17358 

+  34084 

e 

+  18677 

+  741 

f 

-15322 

+  17404 

f 

+  20691 

-15932 

g 

-11735 

+  53697 

g 

+  24323 

+  20420 

h 

+  2980 

+  35062 

h 

+  39000 

+  1750 

i 

+ 16088 

- 16945 

i 

+  52117 

-  50303 

J 

+  24578 

+  16627 

j 

+  60617 

— I667I 

1 

+  44525 

-  53038 

n 

-47453 

+  31040 

m 

+  39302 
Oct.  24 

—  22810 
H 

0 

-16259 
Oct.  24 

+  51135 

H 

276  E. 

a 

7  9  S8 

-74702 

-  9744 

292  W. 

a 

16  31  46 

-38706 

-43112 

b 

-56225 

+  50278 

b 

—  20290 

+ 16964 

c 

-48552 

—  4206 

c 

-12527 

-37563 

d 

-41867 

-33857 

d 

-  5796 

-67242 

e 

-17144 

+  33914 

e 

+ 18848 

+  576 

f 

-15118 

+  17238 

f 

+  20890 

- 16073 

g 

-"550 

+  53519 

g 

+  24512 

+  20260 

h 

+  3094 

+  34867 

h 

+  39207 

+  1607 

i 

+ 16230 

— 17100 

i 

+  52302 

—  50402 

J 

+  24700 

+ 16469 

j 

+  60804 

-16819 

1 

+  44675 

-53212 

n 

-47278 

+  30862 

m 

+  39398 
Oct.  24 

—  22964 
C 

0 

— 16079 
Oct.  24 

+  50970 
C 

277  E. 

a 

7  12  58 

-  74496 

-  9918 

293  W. 

a 

16  34  53 

-38543 

-43276 

b 

-  56093 

+  50073 

b 

-  20088 

+ 16800 

c 

-48388 

-  4390 

c 

-12364 

-37726 

d 

-41700 

-34028 

d 

-  5648 

-67399 

e 

—  1 7004 

+  33689 

e 

+ 1903s 

+  402 

f 

- 14942 

+ 17076 

f 

+  21077 

-16239 

g 

- 11366 

+  53344 

g 

+  24685 

+  20067 

h 

+  3270 

+  34684 

h 

+  39376 

+  1403 

i 

+ 16392 

-17256 

i 

+  52493 

-  50590 

j 

+  24869 

+ 16302 

j 

+  60964 

— 17021 

1 

+  44866 

-53399 

n 

-47073 

+  30703 

m 

+  39584 

-23141 

0 

-15886 

+  50765 

48 


DETERMINATION   OF   THE   SOLAR  PARALLAX 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


Plate 
No. 

Star. 

P.  S. T. 

X 

y 

PUVTE 

No. 

Stab. 

P.  S.  T. 

X 

y 

1900 

1900 

Oct.  24 

H 

Oct.  24 

H 

294  w. 

a 

t6  44  I 

-37950 

-43781 

298  W. 

a 

17  5  IS 

-36630 

—  44889 

b 

-19525 

+  16316 

b 

— 18200 

+  15207 

c 

— 11780 

-38228 

c 

- 10449 

-3935S 

d 

-  5°57 

-67902 

d 

-  3740 

—  69016 

e 

+ 19601 

81 

e 

+  20918 

—  1202 

f 

+  21629 

-16732 

f 

+  22953 

-17838 

e 

+  25265 

+ 19588 

g 

+  26551 

+ 18467 

h 

+  39932 

+  920 

h 

+  41246 

—   212 

i 

+  53060 

-S1091 

i 

+  54383 

-52201 

J 

+  61554 

-17488 

j 

+  62847 

-18622 

n 

-46509 

+  3021S 

n 

-45192 

+  291 1 1 

0 

-15322 
Oct.  24 

+  50277 

C 

0 

-14025 
Oct.  26 

+  49167 
C 

29s  w. 

a 

16  46  43 

-37800 

-43913 

319  E. 

a 

6  52  8 

-60538 

+  23180 

b 

-19372 

+  16153 

b 

-31790 

+  35056 

c 

— 11620 

-38346 

c 

-29135 

+  21255 

d 

-  4899 

-68031 

d 

-28891 

-22051 

e 

+  19756 

—  209 

f 

—  1046 

+  33593 

f 

+  21789 

-16857 

g 

+  1621 

+  2480 

S 

+  25403 

+ 19430 

h 

+  888 

-34801 

h 

+  40080 

+   779 

1 

+  27327 

-  30473 

i 

+  S322I 

-51209 

m 

+  34709 

-11747 

J 

+  61672 

-17636 

n 

-46344 

+  30066 

0 

-I5186 

+  50124 

Oct.  24 

H 

Oct.  26 

H 

396  w. 

a 

16  SS  8 

-37230 

-44368 

320  E. 

a 

6  54  48 

—  60407 

+  23010 

b 

-18804 

+  15734 

b 

—  31662 

+  34874 

c 

- 1 1068 

-38813 

c 

-  28994 

+  21114 

d 

-  4345 

-68476 

d 

-28711 

-22188 

e 

+  20300 

-  657 

f 

-  898 

+  33448 

f 

+  22338 

-17291 

g 

+  1794 

+  2362 

K 

+  25933 

+ 19004 

h 

+  1065 

-  34948 

h 

+  40618 

+   353 

1 

+  27490 

-  30609 

i 

+  53772 

-5163s 

m 

+  34854 

-11879 

j 

+  62232 

-18053 

n 

-45807 

+  29610 

0 

- 14631 
Oct.  24 

+  49699 

c 

Oct.  26 

C 

297  w. 

a 

i6  58  8 

-37080 

-44518 

321  E. 

a 

6  57  15 

-  60234 

+  22860 

b 

-18666 

+  ISSSS 

b 

-31504 

+  34730 

c 

— 10904 

-38950 

c 

-28781 

+  20933 

d 

-  4172 

-68635 

d 

-  28566 

-2  2357 

e 

+  20455 

-  792 

f 

-  718 

+  33298 

f 

+  22496 

-I74I8 

g 

+  1932 

+  2216 

K 

+  26136 

+ 18847 

h 

+  1209 

-35080 

h 

+  40807 

+  193 

1 

+  27636 

-30770 

i 

+  53970 

-5I8IO 

m 

+  35039 

— 12044 

j 

+  62433 

-I82I3 

n 

-45654 

+  29455 

0 

- 14463 

+  49523 

PARALLAX   PLATE   MEASURES 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


49 


Plate 
No. 

Stab. 

P.  S.  T. 

X 

y 

Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

1900 



1900 

Oct.  26 

H 

Oct.  26 

H 

322  E. 

a 

7  3  51 

-S9818 

+  22500 

336  W. 

a 

16  38  58 

-20353 

-  7967 

b 

-31064 

+  34360 

b 

+  8398 

+  3890 

c 

—  28410 

+  20565 

c 

+  11072 

-  9862 

d 

-28161 

—  22726 

d 

+  11352 

-53161 

f 

-  311 

+  32901 

f 

+  39134 

+  2457 

e 

+  2363 

+  1799 

g 

+  41852 

—  28604 

h 

+  163 1 

-35492 

h 

+  41159 

-65858 

I 

+  2804s 

-31166 

n 

-15154 

+  41987 

m 

+  35461 
Oct.  26 

-12450 
C 

0 

-45354 
Oct.  26 

+  26208 
C 

323  E. 

a 

7  7  2 

-59598 

+  22305 

337  W. 

a 

16  42  8 

-20132 

-  8134 

• 

b 

-30857 

+  34157 

b 

+  8615 

+  37451 

c 

—  28204 

+  20358 

c 

+  11279 

— 10032 

d 

-  2796s 

-22917 

d 

+  11585 

-53295 

f 

77 

+  32740 

f 

+  39337 

+  2324 

g 

+  2S73 

+  1609 

g 

+  42065 

-28761 

h 

+  180S 

-35642 

h 

+  41381 

—  66025 

1 

+  28244 

-31356 

n 

- 14937 

+  41833 

m 

+  35616 
Oct.  26 

-12654 
H 

0 

-45148 
Oct.  26 

+  26048 
H 

324  E. 

a 

7  12  58 

-59251 

+  2I9S4 

338  w. 

a 

16  45  15 

- 19930 

-  8258 

b 

-30486 

+  33816 

b 

+  8789 

•+  3591 

c 

—  27801 

+  20044 

c 

+  11477 

—  10164 

d 

-27565 

-23251 

d 

+  11751 

-53473 

f 

+   264 

+  32375 

f 

+  39514 

+  2133 

g 

+  2945 

+  1272 

g 

+  42234 

-  28930 

h 

+  2231 

-36007 

h 

+  41523 

-66193 

1 

+  28647 

-31687 

n 

-14722 

+  41687 

m 

+  36021 
Oct.  26 

— 12966 
C 

0 

-4489s 
Oct.  26 

+  25897 
C 

32s  E. 

a 

7  IS  SI 

-  59040 

+  21788 

339  W. 

a 

16  52  47 

- 19446 

-  8608 

b 

-30274 

+  33651 

b 

+  9299 

+  3243 

c 

-27613 

+ 19853 

c 

+  11973 

— 10516 

d 

-27380 

-  23441 

d 

+ 12243 

-53781 

f 

+  484 

+  32213 

f 

+  40036 

+  1800 

g 

+  3151 

+  1090 

g 

+  42742 

-29270 

h 

+  2403 

-36171 

h 

+  42034 

-66528 

1 

+  28818 

-3186s 

n 

-14238 

+  41330 

m 

+  36218 
Oct.  26 

-13152 
H 

0 

-  44447 
Oct.  26 

+  25587 
H 

326  E. 

a 

7  22  SI 

-58575 

+  21347 

340  w. 

a 

i6  SS   46 

-19252 

-  8718 

b 

—  29821 

+  33219 

b 

+  9493 

+  3"2 

c 

-27159 

+ 19434 

c 

+ 12171 

—  10610 

d 

-26914 

-23850 

d 

+  12458 

-  S3938 

f 

+  932 

+  31776 

f 

+  40214 

+  1680 

g 

+  3601 

+  665 

g 

+  42960 

-  29390 

h 

+  2873 

-36586 

h 

+  42262 

—  66641 

1 

+  2929s 

-32280 

n 

— 14068 

+  41208 

m 

+  36669 
Oct.  26 

-13556 
C 

0 

-44249 
Oct.  26 

+  25449 
C 

327  E. 

a 

7  26  35 

-58357 

+  21184 

341  w. 

a 

17  3  IS 

-18742 

-  9088 

b 

-29572 

+  33032 

b 

+  9988 

+  2742 

c 

-  26906 

+  19242 

c 

+ 12650 

— IIOOO 

d 

-  26698 

-  24074 

d 

+  12938 

-54238 

f 

+  1193 

+  31570 

f 

+  40713 

+  1303 

g 

+  3842 

+  486 

g 

+  43410 

—  29761 

h 

+  3084 

-36822 

h 

+  42698 

-66979 

1 

+  29521 

-32.507 

n 

- 13548 

+  40805 

m 

+  36897 

-13770 

0 

-43745 

+  25052 

so 


DETERMINATION   OF   THE    SOLAR   PARALLAX 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


Plate 
No. 

Star. 

p.  S.  T. 

X 

y 

Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

1900 

1900 

Oct.  26 

H 

Oct.  29 

H 

342  W. 

a 

17  6  8 

- 18549 

—  9211 

347  E. 

a 

6  55  0 

-69729 

+  8716 

b 

+ 10195 

+  2661 

b 

-60582 

-11932 

c 

+ 12876 

—  mis 

c 

-57672 

+  29387 

d 

+  13153 

-  54408 

d 

-3539s 

+ 1949s 

f 

+  40920 

+  1 189 

e 

-15166 

+  38019 

K 

+  43644 

-29872 

f 

—  1840 

+  19111 

h 

+  42942 

-67107 

g 

—  2691 

+  11144 

n 

-13364 

+  40724 

h 

+  14223 

+ 16720 

0 

-43545 
Oct.  26 

+  24967 
C 

i 
1 
m 

+  17408 
+  10230 
+  SS419 
Oct.  29 

—  11692 
-51404 

-  300S 

C 

343  W. 

a 

17  14  24 

—  18004 

—  9609 

348  E. 

a 

7  I  46 

—  69246 

+  8269 

b 

+ 10744 

+  2238 

b 

—  60062 

-12330 

c 

+  13421 

-11532 

c 

-57253 

+  28991 

d 

+ 13685 

-54784 

d 

-34960 

+ 19108 

f 

+  41451 

+  826 

e 

-14754 

+  37694 

e 

+  44194 

-30253 

f 

-  1390 

+ 18789 

h 

+  43468 

-67511 

g 

—  2240 

+ 10830 

n 

-12803 

+  40332 

h 

+  146S7 

+ 16449 

o 

-43016 
Oct.  26 

+  24587 
H 

i 
1 
m 

+  17898 
+ 10810 
+  55908 

Oct.  29 

—  11969 
-51699 

-  3225 

H 

344  W. 

a 

I?  17  3S 

-17812 

-  9728 

349  E. 

a 

7  S  8 

-68993 

+  8237 

b 

+ 10942 

+  2114 

b 

-59856 

-12394 

c 

+ 13632 

— 11669 

c 

-56953 

+  28898 

d 

+  13913 

-  S494I 

d 

-34683 

+ 19010 

f 

+  41644 

+   678 

e 

-  I44S4 

+  37529 

K 

+  44394 

-30393 

f 

—  1140 

+ 18605 

h 

+  43708 

-67648 

g 

-  1999 

+ 1064s 

n 

-12634 

+  40181 

h 

+ 14900 

+  16230 

0 

-42836 
Oct.  29 

+  2441 S 
H 

i 
1 

m 

+ 18095 
+  10944 
+  56110 

Oct.  29 

— 12176 

-S1876 

-  3537 

C 

345  E. 

a 

6  49  IS 

-  70109 

+  8899 

350  E. 

a 

7  II  43 

-68560 

+  7750 

b 

—  60927 

-1 1686 

b 

-  59343 

-12872 

c 

-58136 

+  29611 

c 

-56568 

+  28453 

d 

-35832 

+ 19746 

d 

-34257 

+ 18604 

e 

-15629 

+  38311 

e 

- 14083 

+  37189 

f 

—  2269 

+  19375 

f 

-   707 

+ 18303 

g 

-  3131 

+  11417 

g 

-  1536 

+ 10341 

h 

+  13810 

+  17027 

h 

+ IS353 

+ 15956 

i 

+ 17018 

-"357 

i 

+ 18636 

—  12464 

1 

+  9893 

-S1093 

1 

+  1 1546 

-52191 

m 

+  55003 
Oct.  29 

-  2687 
C 

m 

+  56621 
Oct.  29 

-  3700 
H 

346  E. 

a 

6  SI  47 

—  69928 

+  8734 

351  E. 

a 

7  14  36 

-68338 

+  7784 

b 

—  60746 

-11882 

b 

-5917s 

-1284s 

c 

-57956 

+  29446 

c 

-56300 

+  28439 

d 

-35633 

+  19574 

d 

-34015 

+  18553 

e 

-15464 

+  38149 

e 

-13762 

+  37072 

f 

-  2103 

+ 19265 

f 

-  455 

+ 18142 

g 

-  2942 

+  11300 

g 

-  131S 

+ 10208 

h 

+ 13939 

+ 16924 

h 

+  15581 

+ 15766 

i 

+  17189 

— 11496 

i 

+ 18789 

—  12649 

1 

+ 10091 

-51231 

1 

+ 11628 

-52362 

m 

+  55175 

-  2738 

m 

+  56793 

-  3985 

PARALLAX  PLATE  MEASURES 


SI 


Table  V.  —  Parallax  Plate  Measures  —  Continued. 


PlATE 

No. 

Stak. 

P.  S.  T. 

X 

y 

Plate 
No. 

Stah. 

P.  S.  T. 

X 

y 

1900 

1900 

Oct.  29 

c 

Nov.  3 

c 

357  W. 

a 

16  52  54 

-25208 

-16526 

398  E. 

a 

6  33  S8 

-60228 

-  23746 

b 

-1.5994 

-37124 

b 

-56426 

+  17561 

c 

-13207 

+  4I6I 

c 

-50524 

+  538 

d 

+  9065 

-  5689 

d 

-39328 

+  20051 

e 

+  29260 

+ 12847 

e 

-  5651 

+  16194 

f 

+  42620 

—  6022 

f 

+  12254 

+  8608 

g 

+  41791 

-13978 

g 

+  13272 

-  8180 

h 

+  58696 

-  8360 

h 

+ 16614 

-  29844 

i 

+  61963 

-36742 

1 

+  59356 

- 16506 

0 

-52368 

+  47926 

m 

+  69718 

+  5256 

P 

—  42198 
Oct.  29 

-I5I40 

H 

Nov.  3 

H 

358  W. 

a 

16  55  36 

-25056 

- 16594 

399  E. 

a 

6  40  25 

-  59730 

-  23960 

b 

- 15883 

-37197 

b 

-55951 

+  17370 

c 

-13027 

+  4099 

c 

-49976 

+  332 

d 

+  9250 

-  5797 

d 

-38818 

+ 19860 

e 

+  29435 

-12705 

e 

-  5150 

+ 15993 

f 

+  42795 

-  6198 

f 

+  12726 

+  8422 

g 

+  41943 

-14142 

g 

+ I37S3 

-  8384 

h 

+  58830 

-  8561 

h 

+  17107 

-  30046 

i 

+  62084 

-36949 

1 

+  59784 

— 16700 

0 

-  52090 

+  47900 

m 

+  70166 

+  5047 

P 

-42051 
Oct.  29 

-15141 
C 

Nov.  3 

C 

359  W. 

a 

16  59  25 

-24748 

-16782 

400  E. 

a 

6  43  35 

-59432 

-  2407s 

b 

-15526 

-37370 

b 

-55642 

+ 17222 

c 

-12752 

+  3906 

c 

-49722 

+   182 

d 

+  9508 

-  5920 

d 

-38542 

+ 19730 

e 

+  29688 

+  12613 

e 

-  4922 

+ 15888 

f 

+  43064 

—  6272 

f 

+ 12982 

+  832s 

e 

+  42261 

— 14189 

g 

+ 14038 

-  8462 

h 

+  59150 

-  8602 

h 

+  17385 

-30140 

■  < 

i 

+  62445 

-  36960 

1 

+  60090 

-16770 

0 

-51922 

+  47660 

m 

+  70398 

+  4985 

P 

-41720 
Nov.  3 

-15381 

c 

Nov.  3 

H 

396  E. 

a 

6  28  8 

-  60654 

-  23633 

401  E. 

a 

6  49  48 

-58997 

—  24220 

b 

-56891 

+ 17680 

b 

-55216 

+  17098 

c 

-50945 

+  623 

c 

-49270 

+    43 

d 

-39780 

+  20160 

d 

-38100 

+  19556 

e 

—  6120 

+  16352 

e 

-  4448 

+ 15707 

f 

+ I 1790 

+  8776 

t 

+ 13463 

+  8133 

g 

+ 12814 

-  7985 

g 

+ 14467 

-  8660 

h 

+ 16192 

-  29668 

h 

+ 17834 

-30318 

1 

+  58898 

-16287 

1 

+  60562 

—  17018 

m 

+  69209 
Nov.  3 

+  5467 

H 

m 

+  70916 
Nov.  3 

+  4753 

397  E. 

a 

6  31  I 

—  60408 

-23717 

402  E. 

a 

6  52  58 

-58710 

-2431s 

b 

-  56666 

+  17591 

b 

-54925 

+ 16964 

c 

-  50697 

+   547 

c 

-  48988 

-  64 

d 

-39556 

+  20103 

d 

-37816 

+ 19458 

e 

-  5919 

+  16279 

e 

-  4159 

+  15616 

f 

+  "997 

+  8701 

f 

+  13725 

+  8048 

g 

+ 13016 

-  8087 

g 

+ 14752 

-  8749 

h 

+ 16423 

-29757 

h 

+ iSioi 

-30428 

1 

+  59103 

- 16383 

1 

+  60773 

-17090 

m 

+  69453 

+  5393 

m 

+  71151 

+  4669 

Sa 


DETERMINATION   OF   THE   SOLAR  PARALLAX 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


PtATB 

No. 

Star. 

P.  S.  T. 

X 

y 

Plate 
No. 

SlAK. 

P.  S. T. 

X 

y 

1900 

1900 

Nov.  3 

H 

Nov.  3 

c 

404  E. 

a 

7  3  12 

-S7944 

—  24604 

423  w. 

a 

17  18  47 

-  8338 

-38042 

b 

-54148 

+ 16688 

b 

-  4543 

+  3257 

c 

—  48202 

-  326 

d 

+  12553 

+  5737 

d 

-3702s 

+  19145 

e 

+  46247 

+  1897 

e 

-  3383 

+  15320 

f 

+  64096 

-  5685 

t 

+  14516 

+  7734 

g 

+  65084 

-22475 

g 

+  1SS18 

-  9034 

h 

+  68546 

-44148 

h 

+ 18899 

-30719 

0 

-30592 

+  20358 

1 

+  61602 

-17405 

P 

—  69019 

+  27544 

m 

+  71957 
Nov.  3 

+  4354 
C 

Nov.  3 

c 

417  w. 

a 

16  5S   47 

-10051 

-37692 

424  w. 

a 

17  24  8 

-  7888 

-38145 

b 

-  6279 

+  3628 

b 

-  4146 

+  3172 

d 

+ 10826 

+  6105 

d 

+ 12966 

+  5663 

e 

+  44532 

+  2273 

e 

+  46657 

+  1833 

f 

+  62402 

-  5316 

f 

+  64521 

-  5762 

g 

+  63397 

— 22112 

h 

+  68960 

-  44203 

h 

+  66838 

-43740 

0 

-30154 

+  20248 

0 

-32332 

+  20726 

P 

-68562 

+  27441 

P 

-  70746 
Nov.  3 

+  27932 
H 

Nov.  3 

c 

419  w. 

a 

17  2  11 

-  9540 

-37806 

42s  w. 

a 

17  26  58 

-  7691 

-38146 

b 

-  5782 

+  3512 

b 

-  3932 

+  3153 

d 

+  11312 

+  6003 

d 

+ 13190 

+  5646 

e 

+  45027 

+  21SS 

e 

+  46889 

+  1828 

f 

+  62886 

-  5396 

f 

+  64756 

-  5744 

h 

+  67326 

-43828 

h 

+  69201 

—  44208 

0 

-31832 

+  20598 

0 

-  29998 

+  20208 

P 

-  70265 
Nov.  3 

+  27788 
C 

P 

-68399 
Nov.  3 

+  27389 

c 

420  W. 

a 

17  6  53 

-  9224 

-37849 

426  W. 

a 

17  29  58 

-  7479 

-38226 

b 

-  5433 

+  3438 

b 

-  37" 

+  3078 

d 

+  11674 

+  5918 

d 

+  13396 

+  5566 

e 

+  45358 

+  2076 

e 

+  47082 

+  1742 

f 

+  63212 

-  5S0O 

f 

+  64951 

-  5843 

g 

+  64202 

—  22286 

h 

+  69398 

-44271 

h 

+  67667 

-43937 

0 

-  29740 

+  20176 

0 

—  31466 

+  20525 

P 

-68172 

+  27366 

P 

-  69860 
Nov.  3 

+  27737 
C 

Nov.  10 

c 

421  w. 

a 

17  10  3S 

-  8954 

-37910 

472  E. 

a 

6  16  36 

-65739 

+  11994 

b 

-  S145 

+  3400 

b 

—  65266 

-  8538 

d 

+  11978 

+  5882 

c 

-57996 

-33340 

e 

+  45640 

+  2045 

d 

-38183 

-11150 

f 

+  63508 

-  5551 

e 

-34766 

+  22176 

g 

+  64490 

-22334 

f 

+  3499 

+  54414 

h 

+  67964 

-44025 

g 

+  4770 

+  33280 

0 

-31172 

+  20478 

h 

+ 11280 

+  15219 

P 

—  69580 
Nov.  3 

+  27688 
C 

1 
m 

+  37941 
+  64750 
Nov.  10 

+  550 

+  15795 

H 

422  w. 

a 

17  IS  58 

-  8538 

—  38010 

473  E. 

a 

6  19  35 

-65444 

+  12056 

b 

-  4778 

+  3310 

b 

-64957 

-  8466 

d 

+  12332 

+  5778 

c 

-57704 

-33236 

e 

+  46022 

+  1926 

d 

-37930 

—  Ill  24 

f 

+  63868 

-  5648 

e 

-34487 

—  22201 

K 

+  64889 

—  22461 

f 

+  3818 

+  54484 

h 

+  68321 

—  44086 

g 

+  5038 

+  33286 

0 

-30814 

+  20393 

h 

+  11513 

+ 15206 

P 

-69217 

+  27610 

1 

m 

+  38153 
+  65033 

+  538 
+ 15834 

PARALLAX   PLATE   MEASURES 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


53 


Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

1900 

1900 

Nov.  10 

c 

Nov.  10 

H 

474  E. 

a 

6  22  37 

-65264 

+  11991 

495  W. 

a 

15  56  9 

-18300 

+  I60IS 

b 

-  64802 

-  8539 

b 

-17828 

-  4552 

c 

-S7SSS 

-33320 

c 

- 10479 

—  29308 

d 

-37713 

-III7S 

d 

+  9258 

-  7107 

e 

-34277 

+  22I7S 

e 

+  12694 

+  26195 

f 

+  3991 

+  54407 

f 

+  50947 

+  58433 

K 

+  5233 

+  33269 

S 

+  52157 

+  37302 

h 

+  11744 

+  15213 

h 

+  58668 

+ 19265 

1 

+  38421 

+   547 

0 

-43358 

-  9585 

m 

+  65206 
Nov.  10 

+  15765 
H 

P 

-32290 
Nov.  10 

+ 10430 
H 

47SE. 

a 

6  29  S4 

-64658 

+ 11986 

496  W. 

a 

IS  59  35 

— 18012 

+ 1609s 

b 

-64189 

-  8529 

b 

-17548 

-  4484 

c 

—  56910 

-33335 

c 

-10234 

—  29298 

d 

-37096 

-11152 

d 

+  9520 

-  7032 

e 

-33696 

+  22168 

e 

+ 12986 

+  26252 

f 

+  4SSS 

+  54412 

f 

+  51242 

+  58486 

K 

+  5806 

+  33277 

S 

+  52441 

+  37335 

h 

+  12320 

+ 15209 

h 

+  58960 

+ 19302 

1 

+  39005 

+   562 

0 

-43076 

-  9521 

m 

+  65826 
Nov.  10 

+ 15801 
H 

P 

-32024 
Nov.  10 

+  10520 
H 

476  E. 

6  32  25 

-  64496 

+ 12022 

498  W. 

a 

16  8  12 

-17348 

+ 16198 

—  64021 

-  8528 

b 

-16875 

-  4358 

-56766 

-33346 

c 

-  9512 

-29114 

-36910 

-11168 

d 

+  I020I 

-  6898 

-33514 

+  22180 

e 

+ 13654 

+  26382 

+  4742 

+  S4402 

f 

+  51878 

+  58611 

+  6010 

+  33256 

g 

+  53084 

+  37468 

+  12517 

+  15214 

h 

+  59631 

+ 19436 

+  39168 

+   524 

0 

-42424 

-  9409 

m 

+  65984 
Nov.  10 

+  15742 
H 

P 

-31344 

Nov.  10 

+ 10644 
H 

477  E. 

a 

6  38  36 

-63986 

+  11994 

501  W. 

a 

16  20  35 

— 16410 

+ 16394 

b 

—  63502 

-  8544 

b 

-15936 

-  4184 

c 

-56229 

-33333 

c 

-  8618 

—  28969 

d 

-36434 

— 11172 

d 

+  11144 

-  6768 

e 

-33000 

+  22156 

e 

+ 14590 

+  26570 

f 

+  5266 

+  54398 

f 

+  52812 

+  58795 

S 

+  6505 

+  33248 

g 

+  54043 

+  37666 

h 

+  13012 

+  15198 

h 

+  60576 

+ 19598 

1 

+  39684 

+   524 

0 

-41464 

-  9205 

m 

+  66494 
Nov.  10 

+  15780 
H 

P 

-30412 
Nov.  28 

+ 10824 
H 

478  E. 

a 

6  41  35 

-63722 

+  12015 

615  E. 

a 

5  56  54 

—  67062 

-  1376 

b 

-63258 

-  8520 

b 

-51991 

+ 13342 

c 

-55968 

-  33308 

c 

-17835 

—  29696 

d 

-36152 

—  1 1 198 

d 

+  2840 

+  15018 

e 

-32758 

+  22195 

e 

+ ioi8i 

-56628 

f 

+  5500 

+  54398 

f 

+  22416 

— 61761 

g 

+  6750 

+  33238 

g 

+  31457 

-37499 

h 

+  13255 

+  15205 

h 

+  46236 

—  1040 

1 

+  39922 

+   508 

I 

+  39792 

+  57032 

m 

+  66745 

+  15760 

m 

-13128 

+  71807 

54 


DETERMINATION   OF   THE   SOLAR  PARALLAX 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


Plate 
No. 


6i6  E. 


617  E. 


618  E. 


619  E. 


630  E. 


Stak. 


a 
b 
c 
d 

e 
f 

g 
h 
1 
m 


a 
b 
c 
d 

e 
f 

g 
h 
1 
m 


a 
b 
c 
d 

e 
f 

g 
h 
1 
m 


a 
b 
c 
d 

e 
f 

g 
h 


a 
b 
c 
d 

e 
f 

g 

h 
1 
m 


P.  S.  T. 


S  S9  54 


6  2  36 


6  S  47 


6  8  36 


6  12  8 


1900 
Nov.  28 

-  66956 

-S1903 
-17736 

+  2953 
+ 10260 
+  22490 
+  31536 
+  46343 
+  39916 

—  12984 


Nov.  28 
-66880 
-S1792 
-17653 
+  3048 
+ I03S7 
+  22582 

+  31647 
+  46457 
+  40027 
-12880 


Nov.  28 

—  66740 
-S1685 

-17534 
+  3160 
+ 10472 
+  22706 

+  31745 
+  46561 
+  40102 
— 12796 

Nov.  28 

—  66605 

-S1587 
-17412 

+  3257 
+ 10593 
+  22836 
+  31870 
+  46659 
+  40197 

—  12722 

Nov.  28 
-66519 
-S1465 

—  17287 
+  3378 
+ 10711 
+  22957 
+  32000 
+  46793 
+  40337 
-12579 


C 

-  1182 
+  13546 

-  29490 
+ 15222 

-56425 
-61556 

-37311 

-  839 
+  57231 
+  72035 

H 

-  982 
+ 13740 

-  29303 
+  15413 
-56247 

-61377 
-37136 

-  665 
+  57402 
+  72214 

C 

-  766 
+ 13942 

-  29070 

+  15637 

-  56009 
— 61141 

-  36906 

-  431 
+  57650 
+  72454 

H 

-  586 
+ 14160 

-  28861 
+  15835 
-55774 

-  60924 

-  36672 

-  221 
+  57836 
+  72626 

C 

-  338 
+ 14378 
-28616 
+ 16066 

-55553 

-  60677 

-36438 
+  20 
+  58086 
+  72880 


Plate 
No. 


621  E. 


622  E. 


Star. 


623  E. 


624  E. 


625  E. 


a 
b 
c 
d 

e 
f 

g 
h 
1 
m 


a 
b 
c 
d 

e 
f 

g 
h 
1 
m 


b 
c 
d 
e 
f 

g 
h 
1 
m 


a 
b 
c 
d 
e 
f 

g 
h 
1 
m 


a 
b 
c 
d 

e 
f 

g 
h 
1 
m 


P.  S.  T. 


6  15  8 


6  17  47 


20  43 


X 


6  23  58 


6  26  47 


1900 
Nov.  28 
—  66376 
-51345 
-17179 
+  3499 
+ 10824 
+  23060 
+  32091 
+  46880 
+  40436 
— 12464 


Nov.  28 

—  66310 
-51258 
-17104 

+  3593 
+ 10899 
+  23130 

+  32174 
+  46981 

+  40545 
-12368 

Nov.  28 

—  66206 

-51143 
— 16991 

+  3696 
+  1101S 
+  23245 
+  32295 
+ 4709s 
+  40634 

—  12248 

Nov.  28 

—  66090 
-51036 
-16876 
+  3809 
+  11144 
+  23391 
+  32422 
+  47217 
+  40751 
-12154 

Nov.  28 

—  65996 
-50917 
— 16791 
+  3922 
+ 11219 
+  23466 
+  32502 
+  47313 
+  40874 


H 

-  105 
+ 14613 

-  28389 
+ 16300 
-55310 

-  60456 

-  36207 
+  238 
+  58289 
+  73117 


C 

+  64 
+ 14807 
-28233 
+ 16494 
-55153 
—  60292 
-36057 
+  436 
+  58500 
+  73307 


H 

+   272 

+  14995 

—  28012 
+ 16685 

—  54939 
-60086 
-35838 
+  621 
+  58683 
+  73481 

C 

+  473 
+  15227 

—  27812 
+ 16931 
-54712 
-59855 
-35613 
+  868 

+  58951 
+  73742 

H 
+  694 
+ 15438 

—  27610 
+  1 7109 
-54538 
-59672 
-35432 
+  1047 
+  59106 
+  73928 


PARALLAX   PLATE   MEASURES 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


55 


Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

1900 

1900 

Nov.  28 

c 

Nov.  28 

H 

63s  w. 

a 

14  4  I 

-495  79 

+  36133 

644  W. 

a 

14  44  0 

-48398 

+  39486 

b 

-34471 

+  50864 

b 

-33302 

+  54217 

c 

-  330 

+  7847 

c 

+  853 

+ III89 

d 

+  20302 

+  52599 

d 

+  2I4S4 

+  55889 

e 

+  27718 

- 19083 

e 

+  28887 

-15728 

f 

+  39969 

-24214 

f 

+  41127 

-  2087s 

K 

+  48970 

+  73 

g 

+  S0154 

+  3394 

h 

+  63711 

+  36574 

h 

+  64898 

+  39860 

n 

-15564 

-31567 

n 

-14390 

—  28242 

0 

-55353 
Nov.  28 

-  9217 
c 

0 

14  44  35 

-54150 
Nov.  28 

-  5860 
C 

637  w. 

a 

14  10  0 

-49369 

+  36642 

647  w. 

a 

14  53  0 

-  4809s 

+  40205 

b 

-34257 

+  51369 

b 

-33037 

+  54934 

c 

—   120 

+  832s 

c 

+  1121 

+ 11918 

d 

+  20510 

+  53056 

d 

+  21703 

+  56624 

e 

+  27881 

- 18588 

e 

+  29153 

— 14986 

f 

+  40128 

-23724 

f 

+  41388 

—  20117 

S 

+  49163 

+  516 

g 

+  50410 

+  4112 

h 

+  63962 

+  37017 

h 

+  65167 

+  40569 

n 

-1537s 

-31059 

n 

-14117 

-27466 

0 

14  9  43 

-55225 
Nov.  28 

-  8741 
c 

0 

-53856 
Nov.  29 

-  5197 
H 

639  w. 

a 

14  16  so 

-49155 

+  37154 

648  E. 

a 

5  47  47 

-  80505 

-  5639 

b 

-  34060 

+  51936 

b 

-55526 

-36767 

c 

+   75 

+  8854 

c 

-54281 

-41514 

d 

+  20692 

+  53636 

d 

+ 10738 

+  14355 

e 

+  28118 

-17976 

e 

+ 16860 

+  1826 

f 

+  40368 

—  23126 

f 

+ 19598 

—  62102 

e 

+  49380 

+  1136 

g 

+  29291 

-  23007 

h 

+  64138 

+  37629 

h 

+  34654 

- 14399 

n 

-15195 

-30558 

1 

+  5794 

+  40434 

0 

-54952 
Nov.  28 

-  8246 

H 

m 

-33962 
Nov.  29 

+  62791 
C 

640  W. 

a 

14  18  S3 

-49072 

+  37388 

649  E. 

a 

5  50  25 

—  80429 

-  5415 

b 

-34013 

+  52112 

b 

-55468 

-36546 

c 

+   121 

+  9078 

c 

-54236 

-41319 

d 

+  20781 

+  53816 

d 

+ 10796 

+  14551 

e 

+  28142 

-17829 

e 

+ 16923 

+  2021 

f 

+  40384 

-22958 

f 

+ 19608 

—  61946 

e 

+  49404 

+  1287 

g 

+  29354 

—  22862 

h 

+  64223 

+  37786 

h 

+  34717 

-14224 

n 

-15145 

-30286 

1 

+  5898 

+  40628 

0 

-54875 
Nov.  28 

-  7967 

c 

m 

-33832 
Nov.  29 

+  62974 
H 

643  w. 

a 

14  41  0 

-  48436 

+  39228 

650  E. 

a 

5  53   S3 

-80324 

-  5147 

b 

-33355 

+  53963 

b 

-55373 

-36255 

c 

+   767 

+ 10923 

c 

-54102 

-41055 

d 

+  21409 

+  55636 

d 

+ 10933 

+  14796 

e 

+  28794 

-I60IS 

e 

+  17046 

+  2261 

f 

+  41036 

-2II52 

f 

+  19726 

-61651 

e 

+  S0063 

+  3107 

g 

+  29463 

-22592 

h 

+  64861 

+  39623 

h 

+  3483  s 

-13972 

a 

- 14484 

-28486 

1 

+  6023 

+  40871 

0 

-54256 

—  6170 

m 

-33719 

+  63205 

S6 


DETERMINATION   OF   THE    SOLAR   PARALLAX 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


Plate 

No. 

Star. 

P.  S.  T. 

X 

y 

Plate 
No. 

Star. 

P.  S.  T. 

* 

y 

1900 

1900 

Nov.  29 

c 

Nov.  29 

H 

6s  1  E. 

a 

S  S6  25 

-8o2S3 

-  4950 

656  E. 

6  12  0 

-79756 

-  3849 

b 

-  SS304 

-36104 

-54798 

-34978 

c 

-  S4046 

—40876 

-53547 

-39749 

d 

+ 10997 

+ 14950 

+  I 1488 

+ 16107 

e 

+  17118 

+  2423 

+ 17606 

+  3553 

f 

+ 19786 

-61557 

+  20312 

-60382 

g 

+  29514 

-22434 

+  30046 

-21283 

h 

+  349°o 

-13828 

+  3S402 

—  12659 

1 

+  6067 

+  41030 

1 

+  6562 

+  42168 

m 

-33648 
Nov.  29 

+  63432 

H 

m 

-33172 
Nov.  29 

+  64547 
C 

6S2E. 

a 

S  S9  46 

-8oiS4 

-  4726 

657  E. 

a 

6  14  47 

-79657 

-  3630 

b 

-SS187 

-35864 

b 

-54712 

-34764 

c 

-S3936 

-  40630 

c 

-53465 

-39527 

d 

+ IIIIO 

+  15211 

d 

+  11594 

+ 16310 

e 

+  1721S 

+  2660 

e 

+ 17706 

+  3770 

f 

+ 19923 

-61286 

f 

+  20409 

—  60162 

g 

+  29648 

—  22191 

g 

+  30124 

-2107s 

h 

+  34994 

-13571 

h 

+  35500 

-12451 

1 

+  6168 

+  41303 

1 

+  6657 

+  42384 

m 

-33547 
Nov.  29 

+  63672 
C 

m 

-33069 
Nov.  29 

+  64769 
H 

6S3  E. 

a 

6  2   S3 

-800S7 

-  4529 

658  E. 

a 

6  17  36 

-79562 

-  3416 

b 

-SS086 

-35683 

b 

-54619 

-  34543 

c 

-53818 

-40439 

c 

-53358 

-39298 

d 

+  11210 

+ 15435 

d 

+  1 1690 

+ 16534 

e 

+  17334 

+  2910 

e 

+ 17802 

+  3992 

t 

+  20065 

-61056 

f 

+  20478 

-S99S3 

g 

+  29761 

-21949 

g 

+  30215 

-  20868 

h 

+  35133 

-13325 

h 

+  35582 

— 12229 

1 

+  6272 

+  41508 

1 

+  67SS 

+  42593 

m 

-33456 
Nov.  29 

+  63863 
H 

m 

-32980 
Nov.  29 

+  65008 
C 

6S4E. 

a 

660 

-  79923 

-  4251 

668  W. 

a 

13  57  46 

-64845 

+  33357 

b 

-  54968 

-35400 

b 

-39852 

+  2240 

c 

-53726 

—  40166 

c 

-38611 

-  2546 

d 

+  11322 

+ 15674 

d 

+  26396 

+  53370 

e 

+  17432 

+  3117 

e 

+  32518 

+  40816 

f 

+  20134 

-60835 

f 

+  35256 

-23116 

g 

+  29850 

-21730 

K 

+  44953 

+  15991 

h 

+  35220 

-13113 

h 

+  50320 

+  24604 

1 

+  6382 

+  41742 

n 

-25282 

-  649SS 

m 

-33331 
Nov.  29 

+  64135 
C 

0 

-43738 
Nov.  29 

-56766 
H 

6SSE. 

a 

6  8  46 

-  79840 

-  4064 

669  W. 

a 

14  0  36 

—  64761 

+  33614 

b 

-54892 

-35198 

b 

-39771 

+  2493 

c 

-53636 

-39957 

c 

-38543 

—  2272 

d 

+  1 1407 

+  15875 

d 

+  26481 

+  53612 

e 

+  17517 

+  333" 

e 

+  32607 

+  41058 

f 

+  21998 

—  60609 

f 

+  35305 

-22880 

e 

+  29936 

-21529 

g 

+  45057 

+  16239 

h 

+  35302 

—  12910 

h 

+  50413 

+  24853 

1 

+  6487 

+  41945 

n 

-25217 

—  64699 

m 

-33243 

+  64337 

0 

-43681 

-56482 

PARALLAX   PLATE   MEASURES 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


57 


Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

Plate 
No. 

Stak. 

P.  S.  T. 

X 

y 

1900 

1900 

Nov.  29 

c 

Nov.  29 

H 

670  W. 

a 

14  3  58 

-  64703 

+  33890 

675  w. 

a 

14  19  53 

-64268 

+  35249 

b 

-39680 

+  27S5 

b 

-39280 

+  4149 

c 

-  38466 

-  2018 

c 

-  38039 

-  627 

d 

+  26522 

+  S3870 

d 

+  26957 

+  55247 

e 

+  32667 

+  41332 

e 

+  33075 

+  42701 

f 

+  3S434 

-22585 

f 

+  35839 

— 21219 

K 

+  45 100 

+ 16500 

g 

+  45525 

+ 17883 

h 

+  50467 

+  25142 

h 

+  50876 

+  26492 

n 

-25116 

-64418 

n 

-24717 

—  63041 

0 

-43S70 
Nov.  29 

-56255 
H 

0 

-43146 
Nov.  29 

-54851 
C 

671  W. 

a 

14  6  46 

-64638 

+  34124 

676  W. 

a 

14  22  54 

-64172 

+  35529 

b 

-39637 

+  2999 

b 

-39211 

+  4420 

c 

-  38402 

-  1743 

c 

-37958 

-  356 

d 

+  26616 

+  54138 

d 

+  27065 

+  55472 

e 

+  32736 

+  41564 

e 

+  33186 

+  42912 

f 

+  35476 

-22338 

f 

+  35886 

— 21016 

g 

+  45193 

+  16754 

g 

+  45610 

+ 18107 

h 

+  50544 

+  25381 

h 

+  50972 

+  26717 

n 

-  25070 

-64168 

n 

-  24673 

—  62790 

0 

-43S20 
Nov.  29 

-55966 
C 

0 

-43111 
Nov.  29 

-54595 
H 

672  W. 

a 

14  10  I 

-  64496 

+  34388 

677  w. 

a 

14  26  8 

-64105 

+  35805 

b 

-3951S 

+  3276 

b 

-39106 

+  4685 

c 

-38257 

-  1456 

c 

-37891 

-   76 

d 

+  26707 

+  54350 

d 

+  27115 

+  55766 

e 

+  32821 

+  41820 

e 

+  33247 

+  43259 

£ 

+  35569 

—  22076 

f 

+  35984 

—  20703 

e 

+  45263 

+ 17010 

g 

+  45688 

+ 18394 

h 

+  5061S 

+  25609 

h 

+  51042 

+  27030 

n 

-  24978 

-63893 

n 

-24572 

—  62492 

0 

-43433 
Nov.  29 

-55703 
H 

0 

-43022 
Nov.  29 

-  54283 
H 

673  w. 

a 

14  13  8 

-64422 

+  34674 

678  W. 

a 

14  29  I 

—  64020 

+  36066 

b 

-39412 

+  3575 

b 

-  39029 

+  4961 

c 

-38189 

-  1186 

c 

-37801 

+   173 

d 

+  26788 

+  54647 

d 

+  27201 

+  56001 

e 

+  32917 

+  42104 

e 

+  33318 

+  43471 

f 

+  35600 

-21833 

f 

+  36044 

-  20439 

g 

+  45352 

+  17263 

g 

+  45733 

+ 18637 

h 

+  50702 

+  25860 

h 

+  51 109 

+  27262 

n 

—  24902 

-63618 

n 

-  24499 

-62238 

0 

-43337 
Nov.  29 

-55411 
C 

0 

-42938 
Dec.  s 

-S4034 
H 

674  w. 

a 

14  16  36 

-64378 

+  34970 

713  E. 

a 

5  44  0 

-35812 

-4717s 

b 

-39361 

+  3844 

b 

— 14670 

-  66344 

c 

-38134 

-  915 

c 

-  2198 

-  5582 

d 

+  2687s 

+  54957 

d 

+  3658 

-27796 

e 

+  32989 

+  42412 

e 

+  13518 

+  6658 

f 

+  35756 

-21522 

f 

+  21928 

+  37846 

g 

+  45438 

+  17578 

g 

+  36488 

-  46404 

h 

+  50785 

+  26203 

h 

+  63228 

+   954 

n 

-  24808 

-  63340 

1 

+  23224 

+  74066 

0 

-43259 

-55148 

m 

+  51597 

+  46182 

58 


DETERMINATION   OF   THE   SOLAR   PARALLAX 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


Plate 
No. 

Stak. 

P.  S.  T. 

X 

y 

Plate 
No. 

Stak. 

P.  S.  T. 

* 

y 

1900 

1900 

Dec.  s 

H 

Dec.  5 

c 

714  E. 

a 

S  46  43 

-35831 

-46997 

719  E. 

a 

6  I  25 

-35770 

-45717 

b 

- 14688 

—  66174 

b 

— 14612 

— 64890 

c 

-  220s 

-  5355 

c 

—  2119 

—  4064 

d 

+  3639 

-27592 

d 

+  3738 

—  26294 

e 

+ 13520 

+  6842 

e 

+ 13594 

+  8109 

f 

+  2190S 

+  38013 

f 

+  21972 

+  39280 

g 

+  36457 

-46188 

g 

+  36574 

-  44884 

h 

+  63204 

+  1 108 

h 

+  63280 

+  2366 

1 

+  23199 

+  74220 

1 

+  23240 

+  7SS°o 

m 

+  51549 
Dec.  s 

+  46353 
C 

m 

+  51612 
Dec.  5 

+  47590 
H 

71SE. 

a 

5  50  0 

-35801 

-  46704 

720  E. 

a 

6  4  53 

-35739 

-45400 

b 

— 14662 

-65847 

b 

-  I4S99 

-64572 

c 

-  2182 

-  5051 

c 

—  2102 

-  3772 

d 

+  3677 

—  27280 

d 

+  3741 

-25991 

e 

+  13520 

+  7134 

e 

+ 13593 

+  8394 

f 

+  21904 

+  38295 

f 

+  21984 

+  39576 

e 

+  36513 

-45871 

g 

+  36564 

—  44608 

h 

+  63208 

+  1384 

h 

+  63285 

+  2658 

1 

+  23182 

+  74493 

I 

+  23270 

+  75767 

m 

\ 

+  51561 
Dec.  s 

+  46629 
H 

m 

+  51670 
Dec.  5 

+  47912 
C 

716  E. 

a 

S  S3  0 

-35814 

-46385 

721  E. 

a 

6  8  8 

-35731 

-45122 

, 

b 

— 14684 

-65569 

b 

— 14608 

-  64303 

c 

—  2169 

-  4797 

c 

—  2092 

-  3481 

d 

+  3693 

-27025 

d 

+  3762 

-25710 

e 

+ 13535 

+  7380 

e 

+  13622 

+  8713 

f 

+  21940 

+  38542 

f 

+  22010 

+  39879 

K 

+  36493 

-45610 

g 

+  36588 

-44320 

h 

+  6321S 

+  1616 

h 

+  63339 

+  2965 

• 

1 

+  23249 

+  74744 

1 

+  23287 

+  76088 

m 

+  51619 
Dec.  s 

+  46865 
C 

m 

+  51708 
Dec.  5 

+  48202 
H 

717  E. 

a 

s  ss  36 

-35851 

-46285 

722  E. 

a 

6  10  54 

-35699 

-44882 

b 

-14714 

-65466 

b 

-14564 

-64053 

c 

-  2I4S 

-  4581 

c 

-  2077 

-  3257 

d 

+  3666 

-  26838 

d 

+  3797 

-  25480 

e 

+ 13566 

+  7604 

e 

+ 13641 

+  8920 

f 

+  21965 

+  38757 

f 

+  22024 

+  40102 

g 

+  36490 

-45440 

g 

+  36596 

-44071 

h 

+  63243 

+  1800 

h 

+  63314 

+  3172 

1 

+  23231 

+  74939 

1 

+  23303 

+  76290 

m 

+  S1618 
Dec.  5 

+  47064 
H 

m 

+  51686 
Dec.  5 

+  48446 
C 

718  E. 

a 

S  S8  2S 

-35776 

-  45968 

723  E. 

a 

6  14  8 

-35734 

-  44630 

b 

-  14638 

-65147 

b 

- 14598 

-63835 

c 

-  2134 

-  4330 

c 

—  2066 

-  2972 

d 

+  3720 

-26550 

d 

+  3771 

-25216 

e 

+ 13567 

+  7856 

e 

+  13668 

+  9210 

f 

+  21958 

+  39008 

f 

+  22048 

+  40368 

g 

+  36552 

-45130 

g 

+  36594 

-43816 

h 

+  63261 

+  2112 

h 

+  63363 

+  3450 

1 

+  23198 

+  75190 

1 

+  23319 

+  76597 

m 

+  51598 

+  47343 

m 

+  S1721 

+  48701 

PARALLAX   PLATE   BtEASURES 


59 


Table  V.  —  Parallax  Plate  Measures  —  Continued. 


Plate 
No. 

Star. 

P.  S. T. 

X 

y 

Plate 
No. 

Star. 

P.  S.  T. 

* 

y 

1900 

1900 

Dec.  s 

H 

Dec.  s 

c 

733  W. 

a 

13  21  I 

-33524  . 

-  4683 

738  w. 

a 

13  35  36 

-33522 

-  3219 

b 

-12361 

-23852 

b 

-12378 

— 22411 

c 

+   67 

+  36932 

c 

+   64 

+  38381 

d 

+  5957 

+ 14754 

d 

+  5969 

+ 16194 

e 

+  15778 

+  49126 

e 

+  15775 

+  50562 

f 

+  24151 

+  80293 

f 

+  24138 

+  81729 

g 

+  38779 

-  385s 

g 

+  38776 

-  2429 

h 

+  65457 

+  43390 

h 

+  65460 

+  44861 

0 

+  20371 

-43555 

0 

+  20346 

-42105 

P 

+  43918 
Dec.  5 

-46512 

c 

P 

+  43892 
Dec.  s 

— 45066 

H 

734  W. 

a 

13  23  54 

-33502 

-  4412 

739  W. 

a 

13  39  8 

-33528 

—  2911 

b 

-12374 

-23586 

b 

-12380 

—  22077 

c 

+   58 

+  37198 

c 

+   42 

+  38695 

d 

+  5963 

+  15027 

d 

+  5955 

+ 16539 

e 

+  15778 

+  49409 

e 

+ 15760 

+  50917 

f 

+  24152 

+  80582 

f 

+  2409s 

+  82069 

e 

+  38794 

-  3589 

g 

+  38768 

-  2050 

h 

+  65471 

+  43720 

h 

+  65439 

+  45209 

0 

+  20366 

-43268 

0 

+  20362 

-41774 

p 

+  43927 
Decs 

-46218 

H 

P 

+  43905 
Dec.  5 

-44724 
C 

735  W. 

a 

13  27  I 

-33504 

-  4086 

740  W. 

a 

13  42  0 

-33540 

—  2619 

b 

-12369 

-23265 

b 

-12391 

—  21807 

c 

+   69 

+  37524 

c 

+   8i 

+  39010 

d 

+  5959 

+  15329 

d 

+  59  74 

+  16812 

e 

+  15780 

+  49722 

e 

+  15783 

+  51191 

f 

+  24135 

+  80854 

f 

+  24160 

+  82341 

g 

+  38760 

-  3269 

g 

+  38778 

-  1805 

h 

+  65450 

+  43994 

h 

+  65454 

+  45442 

0 

+  20368 

-42948 

0 

+  20323 

-41513 

P 

+  43904 
Dec.  s 

-45895 
C 

P 

+  43872 
Dec.  5 

-44452 

c 

736  w. 

a 

13  30  I 

-33502 

-  3802 

741  w. 

a 

13  45  8 

-33519 

-  2326 

b 

-12340 

-22975 

b 

-12364 

—  21498 

c 

+   47 

+  37816 

c 

+   22 

+  39303 

d 

+  5947 

+  15624 

d 

+  5935 

+  I7IOS 

e 

+ 15793 

+  50062 

e 

+ 15749 

+  51494 

f 

+  24153 

+  81218 

f 

+  24125 

+  82646 

e 

+  38777 

—  2966 

g 

+  38740 

-  1482 

h 

+  65490 

+  44379 

h 

+  65419 

+  45771 

0 

+  20375 

-42668 

0 

+  20350 

-4II7I 

p 

+  43919 
Dec.  5 

-45607 
H 

P 

+  43879 
Dec.  5 

-44126 

H 

737  W. 

a 

13  32  36 

-33538 

-  3544 

742  w. 

a 

13  47  54 

-33562 

-  2032 

b 

-12387 

-22735 

b 

-12391 

—  2I20O 

c 

+   28 

+  38062 

c 

+    8 

+  39587 

d 

+  5940 

+  15870 

d 

+  5922 

+17399 

e 

+  IS753 

+  50267 

e 

+  15730 

+  51797 

t 

+  24122 

+  81399 

f 

+  24090 

+  82929 

S 

+  38758 

-  2725 

g 

+  38746 

-  1 188 

h 

+  65425 

+  44518 

h 

+  65404 

+  46064 

0 

+  20347 

-42417 

0 

+  20338 

-4090s 

P 

+  43896 

-45362 

P 

+  43866 

-43838 

6o 


DETERMINATION  OF   THE   SOLAR   PARALLAX 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


Plate 
No. 

SlAX. 

P.  S.  T. 

X 

y 

Plate 
No. 

St.\k. 

P.  S.  T. 

X 

y 

1900 
Dec.  s 

c 

1900 
Dec.  6 

c 

743  W. 

a 

13  SI  0 

-33538 

-  1705 

748  E. 

a 

S  52  36 

-41444 

-47401 

b 

-12423 

—  20900 

b 

-39721 

-  24595 

c 

+   S8 

+  3988s 

c 

— 10601 

-39316 

d 

+  5949 

+  17689 

d 

-  5829 

-  203S2 

e 

+ 15786 

+  52075 

e 

+  25460 

-63799 

f 

+  24162 

+ 8321s 

f 

+  32002 

+17532 

S 

+  38757 

—  920 

g 

+  36050 

-62819 

h 

+  65451 

+  46325 

h 

+  43725 

—  40260 

0 

+  20314 

-40603 

1 

+  11677 

+  47476 

P 

+  43866 
Dec.  6 

-43572 

H 

m 

+  35249 
Dec.  6 

+  44508 

H 

744  E. 

a 

s  41  0 

-41428 

-48430 

749  E. 

a 

5  55  43 

—  41428 

-47085 

b 

-39710 

— 2S6i6 

b 

-39687 

-24278 

c 

— 10602 

-  40339 

c 

-IOS7S 

-39017 

d 

-  5834 

-21374 

d 

-  5819 

-200S3 

e 

+  25462 

-64832 

e 

+  2S479 

-63492 

f 

+  31984 

+ 1648s 

f 

+  32021 

+  17789 

K 

+  36049 

-63847 

g 

+  36070 

-62512 

h 

+  43718 

—  41306 

h 

+  43722 

-39991 

1 

+  11683 

+  46399 

1 

+ 11708 

+  47700 

m 

+  35256 
Dec.  6 

+  43474 
C 

m 

+  35286 
Dec.  6 

+  44783 
C 

74SE. 

a 

S  43  SI 

-41444 

-48253 

7SoE. 

a 

5  59  8 

-41427 

-46812 

b 

-39737 

-25432 

b 

-39703 

-  23987 

c 

— 10607 

-40154 

c 

- 10593 

-38713 

d 

-  5862 

-21168 

d 

-  5825 

-19753 

e 

+  25480 

-64598 

e 

+  25489 

—  63190 

f 

+  31999 

+  16786 

f 

+  32014 

+ 18109 

K 

+  36082 

—  63601 

g 

+  36064 

-62215 

h 

+  43724 

-41050 

h 

+  43740 

-39684 

1 

+  11659 

+  46678 

1 

+ 11693 

+  4800s 

m 

+  35227 
Dec.  6 

+  43763 

c 

m 

+  35265 
Dec.  6 

+  45079 
H 

746  E. 

a 

S  46  54 

-41444 

-47880 

751  E. 

a 

620 

-41428 

-  46544 

b 

-39708 

-  2so6o 

b 

-39703 

-23748 

c 

—  10602 

-39798 

c 

- 10594 

-3845s 

d 

-  5828 

-  20843 

d 

-  5813 

- 19497 

e 

+  25467 

-64278 

e 

+  25473 

-62936 

f 

+  32002 

+  17017 

f 

+  32009 

+ 18349 

K 

+  36060 

-63289 

g 

+  36069 

-619SS 

h 

+  43716 

-40773 

b 

+  43735 

-39415 

1 

+ I 1685 

+  46940 

1 

+  11701 

+  48257 

m 

+  35261 
Dec.  6 

+  44006 
H 

m 

+  35262 
Dec.  6 

+  45343 
C 

747  E. 

a 

S  49  36 

-41444 

-4769s 

7S2E. 

a 

656 

-41404 

-46308 

b 

-39729 

-  24879 

b 

-39681 

-  23493 

c 

—  10627 

-  39602 

c 

— ios66 

-38216 

d 

-  5848 

—  20639 

d 

-  5808 

-19243 

e 

+  25457 

—  64108 

e 

+  25518 

—  62664 

f 

+  32037 

+  17251 

f 

+  32023 

+ 18666 

g 

+  36050 

-6310s 

g 

+  36116 

—  61664 

h 

+  437JO 

-40547 

h 

+  43763 

-39127 

1 

+  11715 

+  47166 

1 

+  11686 

+  48566 

m 

+  35277 

+  44252 

m 

+  35256 

+  45666 

PARALLAX   PLATE   MEASURES 
Table  V.  —  Pakallax  Plate  Measures  —  Continued. 


6l 


Plate 
No. 

Star. 

P.  S. T. 

X 

y 

Plate 

No. 

Stai. 

P.  S. T. 

X 

y 

1900 

1900 

Dec.  6 

H 

Dec.  6 

c 

7S3E. 

a 

680 

-41442 

—46027 

767  W. 

a 

13  24  6 

-41363 

-  4503 

b 

-39701 

-23215 

b 

-39650 

+ 18342 

c 

-10578 

-37930 

c 

—  10529 

+  3612 

d 

-  5821 

-18973 

d 

-  5776 

+  22583 

e 

+  2S47S 

-62407 

e 

+  25561 

-20816 

f 

+  32008 

+ 18864 

f 

+  32017 

+  60526 

g 

+  36069 

— 61419 

g 

+  36176 

-19827 

h 

+  43728 

-38891 

h 

+  43780 

+  2745 

1 

+  11680 

+  48777 

0 

+  47043 

-21398 

m 

+  35243 
Dec.  6 

+  45864 
c 

P 

— 10264 
Dec.  6 

-35277 

H 

754  E. 

a 

6  II  0 

-41390 

-45784 

768  W. 

a 

13  27  6 

-41384 

-  4166 

b 

-39670 

-22954 

b 

-  39660 

+  18651 

c 

-  10S68 

-37688 

c 

- 10549 

+  3936 

d 

-  5797 

-18731 

d 

-  5780 

+  22908 

e 

+  25527 

-62147 

e 

+  2SS3S 

—  20502 

f 

+  32017 

+  I9I72 

f 

+  31998 

+  60798 

g 

+  36117 

-6II39 

g 

+  36154 

-19513 

h 

+  43774 

-38617 

b 

+  43753 

+  3040 

1 

+  11683 

+  4907s 

0 

+  47040 

—  21102 

m 

+  35250 
Dec.  6 

+  46I6I 
H 

P 

- 10293 
Dec.  6 

-34966 
C 

764  w. 

a 

13  14  36 

-41319 

-  5408 

769  W. 

a 

13  30  0 

-41404 

-  3903 

b 

-39586 

+  17439 

b 

-39684 

+  18948 

c 

- 10474 

+  2684 

c 

-10576 

+  4200 

d 

-  5704 

+  21641 

d 

-  5812 

+  23192 

e 

+  25596 

-2178s 

e 

+  25524 

-  20230 

f 

+  32128 

+  59535 

f 

+  31962 

+  61088 

g 

+  36201 

—  20807 

g 

+  36144 

-19238 

h 

+  43834 

+  1753 

h 

+  43744 

+  3326 

0 

+  47074 

—  22400 

0 

+  47009 

—  20818 

P 

— I0330 

Dec.  6 

-36214 
C 

P 

—  10306 
Dec.  6 

-34677 
H 

76s  W. 

a 

13  18  0 

-41337 

-  5073 

770  W. 

a 

13  32  36 

-41428 

-  3622 

b 

-  39604 

+  17761 

b 

-39692 

+  19233 

c 

- 10504 

+  3008 

c 

- 10585 

+  4475 

d 

-  5735 

+  21980 

d 

-  5810 

+  23444 

e 

+  25579 

-21454 

e 

+  25491 

-19975 

f 

+  32076 

+  59868 

f 

+  31977 

+  61324 

g 

+  36199 

—  20476 

g 

+  3610S 

- 18993 

h 

+  43822 

+  2077 

h 

+  43724 

+  3549 

0 

+  47077 

—  22048 

0 

+  4694s 

-20561 

P 

— 10252 
Dec.  6 

-35882 
H 

P 

- 10379 
Dec.  6 

-34430 
C 

766  W. 

a 

13  21  IS 

-41347 

-  4754 

771  w. 

a 

13  36  12 

-41444 

-  3271 

b 

-39611 

+ 18082 

b 

-39729 

+ 19583 

c 

-10516 

+  3343 

c 

— 10601 

+  4838 

d 

-  5746 

+  22311 

d 

-  S836 

+  23825 

e 

+  25554 

—  21117 

e 

+  25463 

—  19626 

f 

+  32055 

+  60199 

f 

+  31972 

+  61715 

S 

+  36182 

—  20150 

g 

+  36099 

-  18641 

h 

+  43787 

+  2425 

b 

+  43710 

+  3939 

0 

+  47058 

-21714 

0 

+  46959 

—  20217 

P 

-10265 

-35547 

P 

- 10365 

-34075 

62 


DETERMINATION   OF   THE    SOLAR   PARALLAX 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


Plate 
No. 

Stah. 

P.  S.  T. 

X 

y 

Plate 
No. 

Stas. 

P.  S.  T. 

* 

y 

1900 

1900 

Dec.  6 

H 

Dec.  7 

c 

772  w. 

a 

13  38  53 

-41448 

-  2981 

777  E. 

a 

5  48  47 

— 19980 

-62232 

b 

-39703 

+ 19881 

b 

-15764 

-32934 

c 

-10615 

+  5 108 

c 

-11553 

—  46966 

d 

-  5845 

+  24103 

d 

-  2589 

-32914 

e 

+  25446 

- 19364 

e 

-  1628 

—  28740 

f 

+  31933 

+  61957 

f 

+  1 1498 

+  7720 

S 

+  36054 

-18361 

g 

+  21743 

-18554 

h 

+  43690 

+  4194 

h 

+  60660 

-26334 

0 

+  46923 

-  19937 

1 

+  12149 

+  71085 

P 

- 10392 
Dec.  6 

-33775 
C 

m 

+  22756 
Dec.  7 

+  72024 

H 

773  W. 

a 

13  42  8 

-41479 

-  2675 

778  E. 

a 

5  51  36 

-20039 

—  62012 

b 

-39733 

+  20202 

b 

-IS794 

-32690 

c 

— 10646 

+  5439 

c 

— 11610 

-46743 

d 

-  5891 

+  24424 

d 

-  2637 

-32659 

e 

+  25411 

— 19024 

e 

-  1663 

-28518 

f 

+  31909 

+  62338 

f 

+  11476 

+  7966 

e 

+  36038 

-18028 

g 

+  21702 

-18310 

h 

+  43686 

+  4548 

h 

+  60620 

—  26129 

0 

+  4689s 

— 19616 

1 

+  12178 

+  71338 

p 

- 10393 
Dec.  6 

-  33498 
H 

m 

+  22766 
Dec.  7 

+  722S8 
C 

774  W. 

a 

13  45  8 

-41506 

-  2377 

779  E. 

a 

5  54  36 

-  20063 

-61736 

b 

-39771 

+  20500 

b 

-15828 

-32408 

c 

— 10670 

+  5718 

c 

-1 1633 

—  46469 

d 

-  5902 

+  24713 

d 

-  2654 

-32390 

e 

+  25422 

- 18743 

e 

-  1691 

-28234 

f 

+  31910 

+  62614 

f 

+  11457 

+  8241 

g 

+  36017 

-17762 

g 

+  21682 

— 18024 

h 

+  43660 

+  4817 

h 

+  60589 

-25837 

0 

+  46902 

- 19364 

1 

+ 12148 

+  71595 

P 

- 10424 
Dec.  7 

-3319s 
C 

m 

+  22750 
Dec.  7 

+  72532 
H 

77SE. 

a 

S  42  43 

— 19962 

-62798 

780  E. 

a 

5  59  8 

—  20090 

-61285 

b 

-IS735 

-33463 

b 

-15829 

-31989 

c 

-11533 

-47512 

c 

—  1 1644 

—  46005 

d 

-  2565 

-  33441 

d 

—  2667 

-31954 

e 

—  1607 

—  29262 

e 

-  1698 

-27791 

f 

+  11531 

+  7170 

f 

+  11461 

+  8651 

g 

+  21757 

- 19083 

g 

+  21658 

- 1 7609 

h 

+  60691 

-2687s 

h 

+  60589 

—  25420 

1 

+  12217 

+  70556 

1 

+ 12151 

+  72021 

m 

+  22815 
Dec.  7 

+  71512 
H 

m 

+  22737 
Dec.  7 

+  72972 
C 

776  E. 

a 

5  46  0 

-19991 

-62505 

781  E. 

a 

6  I  53 

—  20071 

-61075 

b 

-15756 

-33182 

b 

-15829 

-31759 

c 

-11564 

-47231 

c 

-11635 

-45798 

d 

-  2592 

-33156 

d 

—  2667 

-31726 

e 

—  1619 

-  28994 

e 

-  1699 

-27547 

£ 

+ I 1504 

+  7467 

f 

+  11424 

+  8902 

g 

+  21722 

-18800 

g 

+  21652 

-17362 

b 

+  60656 

—  26606 

h 

+  60569 

-25159 

1 

+  1 2196 

+  70853 

1 

+ 12085 

+  72263 

m 

+  22789 

+  71793 

m 

+  22666 

+  73206 

PAIIALLAX   PLATE   MEASURES 


63 


Table  V.  —  Parallax  Plate  Measures  —  Continued. 


Plate 
No. 

Stas. 

P.  S.  T. 

X 

y 

Plate 
No. 

Stab. 

P.  S.  T. 

X 

y 

1900 

1900 

Dec.  7 

H 

Dec.  7 

c 

782  E. 

a 

6  4  46 

—  20097 

-60785 

797  W. 

a 

13  7  8 

-21885 

- 19965 

b 

-15854 

-31491 

b 

-17711 

+  9416 

c 

-11666 

-45544 

c 

- 13498 

-  4670 

d 

-  2698 

-31461 

d 

-  4537 

+  9432 

e 

—  1710 

-27294 

e 

-  3563 

+ 13603 

£ 

+  11431 

+  9166 

f 

+  9542 

+  50091 

K 

+  21640 

-17097 

g 

+  19778 

+  23824 

h 

+  60560 

-  24894 

h 

+  58715 

+ 16023 

1 

+  12124 

+  72538 

0 

+  70797 

-23600 

m 

+  22707 
Dec.  7 

+  73480 
C 

P 

+  38071 
Dec.  7 

-35224 

H 

783  E. 

a 

6  7  54 

—  201 1 2 

-  60508 

798  W. 

a 

13  10  8 

-21939 

- 19639 

b 

-15871 

-31186 

b 

-17751 

+  9737 

c 

— 11676 

-45230 

c 

-13531 

-  4350 

d 

—  2699 

-31170 

d 

-  4564 

+  9754 

e 

-  1729 

—  27008 

e 

-  3590 

+ 13899 

f 

+  11427 

+  9450 

f 

+  9528 

+  50371 

g 

+  21642 

- 16807 

g 

+  19752 

+  24118 

h 

+  60544 

—  24622 

h 

+  58693 

+ 16328 

1 

+  12119 

+  72797 

0 

+  70733 

-23270 

m 

+  22713 
Dec.  7 

+  73752 

c 

P 

+  37984 
Dec.  7 

-  34901 
C 

784  E. 

a 

6  II  8 

—  20082 

—  60205 

799  W. 

a 

13  12  46 

—  21967 

- 19384 

b 

-15852 

-30912 

b 

-17774 

+  9982 

c 

— 11662 

-  44945 

c 

-13562 

-  4104 

d 

-  2693 

-30876 

d 

—  4600 

+ 10007 

e 

-  1732 

—  26721 

e 

-  3626 

+  14150 

f 

+ 11402 

+  9753 

f 

+  9450 

+  50638 

g 

+  21626 

- 16509 

g 

+  19716 

+  24389 

h 

+  60554 

-  24301 

h 

+  58631 

+ 16598 

1 

+ 12068 

+  731" 

0 

+  70707 

—  22992 

m 

+  22648 
Dec.  7 

+  74063 
H 

P 

+  37987 
Dec.  7 

-34630 
H 

78s  E. 

a 

6  14  0 

—  20108 

-  59964 

800  w. 

a 

13  16  S 

—  21984 

-19019 

b 

-15874 

-30657 

b 

-17797 

+ 10338 

c 

-11668 

-44703 

c 

-13582 

-  3746 

d 

-  2715 

-30624 

d 

-  461S 

+ 10357 

e 

-  1756 

-  26474 

e 

-  3640 

+  14516 

f 

+  11405 

+  100173 

f 

+  9465 

+  50993 

g 

+  21606 

— 16290 

g 

+ 19702 

+  24724 

h 

+  60516 

-  24059 

h 

+  58621 

+ 16926 

1 

+  12074 

+  73389 

0 

+  70676 

—  22693 

m 

+  22664 
Dec.  7 

+  74320 
H 

P 

+  37939 
Dec.  7 

-34300 
C 

796  W. 

a 

13  4  II 

-21880 

—  20226 

801  w. 

a 

13  19  S 

—  22029 

-18717 

b 

-17693 

+  9130 

b 

— 17840 

+ 10671 

c 

- 13480 

-  4929 

c 

-13628 

-  3427 

d 

-  4502 

+  9166 

d 

-  4661 

+ 10658 

e 

-  3545 

+ 13299 

e 

-  3694 

+ 14832 

f 

+  9564 

+  49774 

f 

+  9416 

+  S1332 

g 

+  19814 

+  23506 

g 

+ 19654 

+  25032 

h 

+  58735 

+  15724 

h 

+  58604 

+  17200 

0 

+  70780 

-  23879 

0 

+  70621 

-22382 

P 

+  38064 

-35491 

P 

+  37906 

-  34005 

64 


DETERMINATION   OF   THE   SOLAR  PARALLAX 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


Plate 
No. 

Stai. 

P.  S.  T. 

X 

y 

Plate 
No. 

SlAS. 

P.  S.  T. 

X 

y 

1900 

1900 

Dec.  7 

H 

Dec.  7 

H 

802  W. 

a 

13  21  SO 

—  22074 

-18421 

806  W. 

a 

13  34  10 

-22233 

-17198 

b 

-17861 

+ 10939 

b 

-  18003 

+ 12167 

c 

-13654 

-  3142 

c 

-13799 

-  1892 

-  4692 

+ 1094s 

d 

-  4803 

+  12193 

-  3721 

+  15101 

e 

-  3839 

+  16342 

+  9401 

+  51580 

f 

+  9241 

+  52842 

+ 19640 

+  25313 

g 

+ 19498 

+  26563 

+  58553 

+  17474 

h 

+  58427 

+ 18743 

+  70587 

—  22120 

0 

+  70478 

—  20809 

+  37867 
Dec.  7 

-33727 
C 

P 

+  37768 
Dec.  24 

-32442 
C 

803  W. 

a 

13  25  5 

-22074 

— 18107 

89s  E. 

a 

5  47  25 

-39858 

+  3098 

b 

-17892 

+  11241 

b 

-20551 

-71579 

c 

- 13693 

-  2814 

c 

-21934 

—  26632 

d 

-  47" 

+  11264 

d 

-18607 

+  22233 

e 

-  3738 

+  15425 

e 

+13838 

-51904 

f 

+  9364 

+  51901 

f 

+  21166 

-59820 

S 

+ 19603 

+  25634 

g 

+  23320 

-64995 

h 

+  58504 

+  17829 

h 

+  24588 

+  13464 

0 

+  70552 

-21771 

i 

+52431 

-16325 

P 

+  37835 
Dec.  7 

-33371 
H 

J 
1 
m 

+  1614 
-14556 
-3S70I 

Dec.  24 

-26864 
+48040 
+35458 

H 

804  W. 

a 

13  28  0 

-22097 

-17804 

896  E. 

a 

5  SI  12 

—  40170 

+  3490 

b 

-17923 

+  IISS3 

b 

—  20829 

-71127 

c 

-13701 

-  2524 

c 

—  22227 

—  26220 

d 

-  4739 

+  11570 

d 

-18918 

+  22606 

e 

-  3781 

+  15742 

e 

+ 13536 

-51487 

f 

+  9312 

+  52201 

t 

+  20866 

-S9392 

S 

+  19573 

+  25932 

g 

+  23022 

-64543 

h 

+  58498 

+  18132 

h 

+  24250 

+ 13874 

0 

+  70532 

-21456 

i 

+  52124 

-15868 

P 

+  3781S 
Dec.  7 

-33087 
C 

J 
m 

+  1306 
-14878 
-36038 

Dec.  24 

—  26460 
+  48426 
+  35832 

C 

8osW. 

a 

13  31  5 

—  22142 

-17492 

897  E. 

S  S3  25 

-40378 

+  3689 

b 

-17957 

+ 11864 

—  20976 

—  70892 

c 

-13741 

-  2218 

—  2  2409 

—  26003 

d 

-  4793 

+  11891 

— 19122 

+  22833 

e 

-  3817 

+  16033 

+ 13388 

-51244 

f 

+  9268 

+  52495 

+  20720 

-59132 

g 

+  19522 

+  26248 

+  22885 

-64308 

h 

+  58454 

+ 18464 

+  2403s 

+  14130 

0 

+  70493 

— 21122 

+  5 1945 

-15613 

P 

+  37791 

-32743 

m 

+  1132 
-15102 
—  36262 

-26197 
+  48628 
+  36014 

PARALLAX   PLATE   MEAStTRES 
Table  V.  —  Parallax  Plate  Measitres  —  Continued. 


6S 


Plate 
No. 

Star. 

P.  S.  T. 

X 

y 

Plate 
No. 

Stak. 

P.  S.  T. 

X 

y 

1900 

1900 

Dec.  24 

H 

Dec.  24 

H 

898  E. 

a 

s  56  46 

—  40666 

+  4080 

908  W. 

a 

12  35  0 

-  74702 

+  48382 

b 

—  21270 

-70532 

b 

-55309 

—  26212 

c 

-22705 

-25625 

c 

-56767 

+ 18698 

d 

- 19433 

+  23205 

d 

-  53484 

+  67505 

e 

+ 13089 

-50869 

e 

—  20998 

-  6558 

f 

+  20414 

-58789 

f 

- 13661 

-14472 

S 

+  22575 

-63942 

S 

—  1 1469 

- 19653 

h 

+  23762 

+ 14478 

h 

- 10340 

+  58797 

i 

+  51655 

-15256 

i 

+  17521 

+  29091 

J 

+   82s 

-25847 

j 

-33248 

+ 18467 

1 

-15376 

+  49014 

0 

+ 14243 

-68714 

m 

-36538 
Dec.  24 

+  36419 
C 

P 

+  25195 
Dec.  24 

—  41012 
C 

899  E. 

a 

S  59   54 

—  40928 

+  4403 

909  W. 

a 

12  38  0 

-  74968 

+  48740 

b 

-21556 

-70207 

b 

-55578 

-25824 

c 

—  22980 

-25300 

c 

-57023 

+ 19064 

d 

— 19669 

+  23543 

d 

-S3735 

+  67862 

e 

+ 12807 

-50555 

e 

-2I27S 

-  6198 

f 

+  20154 

-  58466 

f 

-13932 

— 14106 

S 

+  22310 

-63654 

g 

-11751 

- 19287 

h 

+  23513 

+  14822 

h 

-  10618 

+  59120 

i 

+  51373 

- 14934 

i 

+  17249 

+  29411 

J 

+   578 

-25528 

j 

-33514 

+ 18823 

1 

-15634 

+  49349 

0 

+ 13958 

-68378 

m 

-36805 
Dec.  24 

+  36741 
H 

P 

+  24880 
Dec.  24 

-  40668 
H 

900  E. 

a 

6  3  IS 

-41196 

+  4757 

910  w. 

a 

12  40  36 

-75174 

+  49057 

b 

—  21822 

-69845 

b 

-55826 

-25528 

c 

-23259 

-  24940 

c 

-57233 

+ 19388 

d 

-19956 

+  23893 

d 

-53970 

+  68163 

e 

+  12527 

-50178 

e 

-21501 

-  5893 

f 

+ 19879 

-  58084 

f 

-14188 

- 13820 

g 

+  22036 

-63276 

g 

-1 1956 

-19032 

h 

+  23235 

+ 15181 

h 

-10816 

+  S937I 

i 

+  SII2i 

-14577 

i 

+  17019 

+  29692 

j 

+   313 

-25147 

j 

-33738 

+ 19156 

1 

-  15898 

+  49691 

0 

+ 13698 

—  68040 

m 

-37071 

Dec.  24 

+  37082 
C 

P 

+  24623 
Dec.  24 

-40337 
C 

901  E. 

a 

6  5  S8 

— 41416 

+  5060 

9irW. 

a 

12  44  47 

-75573 

+  49542 

b 

—  22084 

-69554 

b 

-56224 

-25055 

c 

-23472 

—  24641 

c 

-57653 

+  19844 

d 

—  20160 

+  24186 

d 

-  54340 

+  68668 

e 

+  12276 

-49910 

e 

-21886 

-  5410 

f 

+ 19622 

-57834 

f 

- 14549 

-13337 

K 

+  21770 

-63017 

g 

-12381 

-18548 

h 

+  23028 

+ 15449 

h 

-1121S 

+  59923 

i 

+  50881 

-  14332 

i 

+ 16652 

+  30195 

j 

+   63 

-  24880 

J 

-34129 

+ 19610 

1 

— 16094 

+  49990 

0 

+  13329 

-67594 

m 

-37254 

+  37400 

P 

+  24255 

-39910 

66 


DETERMINATION   OF   THE   SOLAR   PARALLAX 
Table  V.  —  Parallax  Plate  Measures  —  Continued. 


Plate 
No. 

Stak. 

P.  S.  T. 

X 

y 

Plate 
No. 

Stah. 

P.  S.  T. 

X 

y 

1900 

1900 

Dec.  24 

H 

Dec.  24 

H 

912  W. 

a 

12  48  n 

-  75902 

+  4989s 

914  w. 

a 

12  54  II 

-  76476 

+  50602 

b 

-56512 

-  24679 

b 

-57068 

-23972 

c 

-57961 

+  20214 

c 

-58514 

+  20914 

d 

-  54688 

+  69025 

d 

-55256 

+  69722 

e 

—  22206 

-  5026 

e 

-22748 

-  4325 

f 

- 14862 

-12944 

f 

-15433 

-12238 

g 

-12689 

-18147 

g 

-13242 

-17439 

h 

-11581 

+  60352 

h 

-12094 

+  60989 

i 

+  16315 

+  30590 

i 

+  15770 

+  31280 

J 

-  34448 

+ 19976 

j 

-35006 

+  20687 

0 

+ 13056 

-67193 

0 

+ 12486 

—66492 

P 

+  23963 
Dec.  24 

-39468 

c 

P 

+  23404 

-38791 

913  w. 

a 
b 
c 
d 

e 
f 
g 
h 
i 

J 
0 

P 

12  51  8 

-76155 
-56770 

-58217 
-54937 
-22465 
-15122 
-12942 
-11837 
+ 16053 
-34704 
+  12761 

+  23674 

+  5024s 

-  24330 
+  20573 
+  69358 

-  467s 
-12599 
-17762 
+  60717 
+  30919 
+  20333 

-66866 
-39136 

PARALLAX   PLATE   CONSTANTS 
Table  VI.  —  Parallax  Plate  Constants. 


67 


Plate  Constants. 

Standard  Constants. 

Refraction  Constants.     | 

Date. 

Plate 

No. 

P 

r 

P 

r 

Mx 

My,Nx 

Ny 

Oct.  6  E. 

92 

_. 

300304 

+.000067 

+.000769 

—.000211 

+  .000329 

93 

+ 

87 

+ 

146 

752 

201 

323 

94 

- 

438 

+ 

241 

738 

191 

318 

95 

+ 

449 

- 

124 

693 

162 

303 

96 

4- 

209 

336 
I 
II 

+.000071 
+    14 

+.000564 
+   643 

680 

IS3 

298 

W. 

104 

+ 

30 

— 

276 

352 

—     2 

247 

105 

- 

23 

+ 

451 

360 

0 

(( 

106 

+ 

IS 

+ 

II 

368 

+     2 

(( 

107 

+ 

446 

+ 

462 

382 

6 

tl 

108 

446 

644 
I 
II 

—.000063 
—    206 

+.001 160 
+   nil 

386 

7 

it 

Oct.  12  E. 

134 

+ 

ii 

— 

448 

486 

39 

251 

135 

- 

189 

- 

661 

S14 

54 

258 

136 

+ 

66 

- 

326 

SSi 

74 

267 

137 

+ 

68 

+ 

730 

616 

115 

284 

138 

+ 

148 

- 

63 

653 

137 

294 

139 

+ 

256 

+ 

344 

736 

188 

315 

140 

367 

+ 

440 
I 
II 

+  .0001 1 1 
184 

+.000646 
+    519 

773 

208 

326 

W. 

145 

+ 

115 

+ 

170 

389 

+     2 

246 

146 

+ 

253 

+ 

117 

396 

4 

" 

147 

- 

312 

+ 

60 

410 

8 

247 

148 

70 

346 
I 
II 

-.000433 
260 

+.000854 
+    983 

421 

12 

tt 

Oct.  13  E. 

ISO 

— 

618 

— 

345 

994 

-    382 

440 

151 

+ 

568 

+ 

91 

968 

338 

426 

152 

+ 

125 

— 

3 

949 

310 

415 

153 

86 

+ 

249 
I 
II 

—.001840 
-   1533 

—.002722 
-   3078 

866 

27s 

367 

W. 

163 

— 

532 

+ 

266 

408 

+     7 

24S 

164 

— 

no 

+ 

107 

412 

9 

245 

i6s 

- 

627 

- 

71 

420 

12 

246 

166 

+ 

118 

- 

95 

437 

19 

247 

167 

+ 

295 

— 

175 

443 

21 

247 

168 

+ 

336 

- 

241 

460 

27 

248 

169 

+ 

487 

+ 

210 
I 
II 

-.001376 
—   1192 

—  .003080 

-  2800 

466 

29 

249 

Oct.  14  E. 

170 

+ 

197 

— 

153 

861 

274 

36s 

171 

+ 

276 

- 

38s 

847 

264 

360 

172 

+ 

29 

+ 

699 

828 

250 

353 

173 

+ 

68 

+ 

III 

765 

206 

329 

174 

— 

412 

+ 

199 

751 

197 

323 

17s 

- 

133 

- 

13s 

708 

167 

307 

176 

+ 

195 

— 

343 

694 

157 

302 

177 

- 

64 

0 

649 

126 

284 

178 

-.000157 

.000000 

f. 000634 

-.0001x5 

+.000278 

I 

-.000330 

—.000661 

II 

913 

+    17 

68 


DETERMINATION   OF   THE   SOLAR   PARALLAX 
Table  VI.  —  Parallax  Plate  Constants  —  Continued. 


Plate  Constants. 

Standard  Constants. 

Refraction  Constants.     | 

Date. 

Plate 

No. 

P 

r 

P 

r 

M^ 

My,N^ 

Ny 

Oct.  14  W. 

187 

—  .000007 

—.000192 

+.000400 

+  .000004 

+.000245 

188 

2SS 

301 

406 

6 

245 

189 

+    48 

3 

416 

10 

246 

190 

+   262 

+    221 

438 

18 

247 

191 

-   306 

171 

444 

20 

247 

192 

+   255 

+    81 

460 

26 

248 

193 

+     9 

+    368 

I 
II 

—.000714 
-   1085 

-.000379 
-   386 

467 

28 

248 

Oct.  IS  E. 

IQS 

+    203 

+    279 

830 

-    249 

349 

196 

+     3 

-    167 

809 

234 

341 

197 

76 

286 

761 

201 

323 

198 

—    296 

+   836 

747 

192 

318 

199 

+    59 

4S8 

71S 

169 

306 

201 

+    147 

—    205 

667 

135 

288 

203 

39 

+     14 
I 
II 

—.000648 
-   76s 

—.000114 
—    20 

652 

125 

283 

W. 

213 

+     52 

-   ioo8 

408 

+     5 

246 

214 

-   IS4 

+   6s8 

414 

7 

246 

215 

-   161 

—   902 

420 

9 

247 

216* 

I  -   333 

+   2472 

441 

17 

248 

II  -   326 

+    2S2I 

217* 

I  -   37S 
II-   344 

+    2309 
+    2312 

446 

19 

248 

218* 

I  -   729 

II  -   474 

-  2967 

-  3IIO 

462 

25 

249 

219 

+   338 

+   2s8 

470 

28 

249 

220 

-   32s 

+     856 

48s 

34 

250 

221 

+   284 

+   140 
I 
II 

—.000044 
45 

— .000947 
976 

491 

36 

251 

Oct.  16  E. 

222 

-    2S3 

+   204 

866 

-    276 

36s 

223 

97 

682 

846 

262 

357 

224 

-    138 

+     637 

822 

245 

347 

22s 

401 

+      31 

781 

216 

331 

226 

+    224 

+    577 

7S8 

200 

322 

227 

+    281 

-    836 

724 

176 

309 

228 

+    279 

+    466 

710 

166 

3°4 

230 

+    135 

374 
I 
II 

+.000076 
—    222 

+.002436 
+  2646 

657 

128 

282 

W. 

239 

50 

+    114 

443 

+    17 

245 

240 

171 

72 

452 

21 

246 

241 

48 

+   2S9 

464 

26 

247 

242 

+    195 

174 

478 

32 

248 

243 

322 

+    29 

485 

35 

249 

244 

+.000406 

—  .000181 
I 
II 

-.000S03 
-    877 

+.002124 
+  2406 

+.000499 

+.000041 

+.000250 

*  Indicates  that  plates  were  reduced  direct  and  not  through  the  standard. 


PARALLAX   PLATE   CONSTANTS 
Table  VI. — Parallax  Plate  Constants  —  Continued. 


69 


Plate  Constants. 

Standard  Constants. 

Repraction 

Constants.     | 

Date. 

Plate 
No. 

P 

r 

P 

r 

Mx 

My, 

Nx 

Ny 

Oct.  21  E. 

247 

39 

334 

+.000786 

—.000212 

+.000326 

248 

+ 

122 

+ 

316 

775 

204 

322 

250 

— 

20 

+ 

199 

719 

166 

302 

251 

— 

68 

— 

221 

694 

149 

294 

252 

— 

107 

- 

283 

679 

138 

289 

2S3 

- 

30 

+ 

235 

647 

116 

278 

2S4 

+ 

109 

+ 

loS 
I 
II 

—.000100 
67 

+.OOOS54 
+    585 

634 

108 

273 

W. 

264 

+ 

19 

+ 

26 

475 

+ 

23 

248 

26s 

+ 

45° 

- 

328 

483 

27 

249 

266 

— 

16 

— 

92 

491 

31 

250 

267 

+ 

34 

+ 

71 

5J4 

42 

253 

268 

+ 

204 

+ 

10 

520 

45 

254 

269 

— 

346 

+ 

147 

543 

55 

257 

270 

— 

197 

+ 

34 

SSO 

59 

258 

271 

174 

+ 

147 
I 
II 

-.000057 
59 

—.000242 
252 

568 

68 

260 

Oct.  24  E. 

27s 

— 

6 

+ 

262 

708 

- 

147 

296 

276 

- 

29 

- 

233 

698 

139 

293 

277 

+ 

176 

— 

32 

687 

131 

290 

278 

118 

+ 

19 
I 
II 

+.000099 
+    266 

-.002253 
—   2211 

656 

III 

280 

W. 

291 

— 

313 

- 

277 

48s 

+ 

25 

248 

292 

— 

36 

+ 

104 

494 

29 

250 

293 

+ 

42 

- 

278 

504 

33 

251 

294 

- 

63 

- 

39 

532 

47 

256 

29s 

+ 

227 

+ 

30 

541 

51 

257 

296 

+ 

188 

+ 

270 

568 

62 

261 

297 

— 

126 

+ 

246 

577 

66 

263 

298 

+ 

66 

39 

I 
II 

—.000892 
71S 

-.003314 
-   3189 

600 

76 

267 

Oct.  26  E. 

319 

— 

7S 

— 

157 

719 

- 

15s 

298 

320 

- 

100 

+ 

495 

708 

148 

295 

321 

+ 

137 

+ 

267 

699 

143 

293 

322 

— 

tii 

- 

III 

675 

130 

286 

323 

+ 

163 

- 

191 

663 

123 

283 

324 

- 

8 

+ 

213 

642 

109 

277 

32s 

_ 

19 

— 

86 

631 

102 

274 

326 

+ 

251 

+ 

99 

606 

86 

267 

327 

236 

480 
I 
II 

-.OOOS79 
700 

—.001986 
-   225s 

593 

75 

264 

W. 

336 

- 

122 

+ 

180 

549 

+ 

49 

257 

337 

— 

115 

+ 

370 

559 

55 

259 

338 

- 

13 

- 

273 

569 

61 

261 

339 

— 

16 

— 

240 

594 

76 

266 

340 

- 

266 

+ 

99 

604 

82 

268 

341 

+ 

583 

- 

310 

629 

96 

274 

342 

— 

39 

- 

40 

639 

lOI 

276 

343 

+ 

88 

- 

36 

666 

117 

282 

344 

-. 

000148 

+. 

000242 

+.000677 

+.000122 

+.000284 

I 

+.000027 

—  .002976 

II 

392 

-   3326 

70 


DETERMINATION   OF   THE    SOLAR   PARALLAX 
Table  VI.  —  Parallax  Plate  Constants  —  Continued. 


Plate  Constants. 

Standard  Constants. 

Refraction 

Constants.     | 

Date. 

Plate 

No. 

P 

r 

P 

r 

M:, 

My, 

Nx 

Ny 

Oct.  29  E. 

345 

+.000007 

+.000340 

+.000648 

-.000116 

+.000286 

346 

+    217 

+   971 

642 

III 

284 

347 

-    263 

-   1044 

635 

105 

281 

348 

69 

+   782 

620 

91 

276 

349 

+    279 

—   1229 

613 

84 

273 

35° 

-    180 

+   1438 

598 

71 

268 

3SI 

+    18 

-   1257 
I 
II 

—.000022 
-    219 

+.000864 
+  1016 

592 

65 

266 

W. 

357 

+     4 

+    397 

655 

+ 

103 

279 

358 

+     36 

-   1248 

668 

no 

282 

359 

50 

+    838 
I 
11 

+.000199 
27 

-.000373 
197 

680 

118 

286 

Nov.  3  E. 

396 

117 

+    516 

619 



90 

264 

397 

19 

+    660 

610 

85 

263 

398 

-    20s 

-  ,  329 

601 

80 

261 

399 

241 

-   r  256 

583 

71 

258 

400 

+    309 

+     210 

571 

64 

256 

401 

39 

277 

553 

55 

253 

402 

+    198 

199 

544 

5° 

252 

404 

+     94 

312 

I 
II 

—.000024 
+    115 

+.002442 
+  2803 

516 

34 

247 

W. 

417 

92 

+      23 

751 

+ 

179 

307 

419 

+     87 

■+     273 

781 

203 

322 

420 

+    158 

184 

806 

224 

334 

421 

229 

394 

826 

240 

344 

422 

+    174 

-    138 

851 

261 

357 

423 

+     21 

271 

866 

273 

364 

424 

+     50 

+    148 

891 

294 

377 

425 

—    221 

+    298 

906 

306 

384 

426 

+    45 

+    267 
I 
II 

—.000511 
—    460 

+.000423 
+   908 

921 

318 

393 

Nov.  10  E. 

472 

237 

+    153 

531 

_ 

39 

250 

473 

+    208 

-    356 

524 

36 

250 

474 

-    256 

—   no 

S17 

33 

250 

475 

+    147 

+   318 

499 

25 

248 

476 

153 

15 

492 

23 

248 

477 

+    47 

+     39 

475 

16 

246 

478 

+    234 

+      7 
I 
II 

-.000431 
722 

-.003298 
-  3472 

470 

12 

245 

W. 

495 

+    86 

+    127 

679 

+ 

126 

281 

496 

143 

23s 

696 

139 

288 

498 

+   272 

+    106 

730 

166 

303 

SOI 

—  .000226 

+  .00001 1 

+.000786 

+.000212 

+.000328 

I 

-.000535 

-.005173 

II 

743 

-  5356 

PARALLAX   PLATE   CONSTANTS 
Table  VI.  —  Parallax  Plate  Constants  —  Continued. 


71 


?LATE  Constants. 

Standard  Constants. 

Refraction  Constants.     | 

Date. 

Plate 
No. 

P 

r 

P 

r 

Mx 

My,Nx 

Ny 

Nov.  28  E. 

61S 

—.000112 

+.000031 

+.000374 

+.000009 

+.000247 

616 

— 

57 

116 

370 

10 

a 

617 

- 

23s 

-   283 

366 

II 

a 

618 

- 

7 

131 

361 

12 

248 

619 

+ 

172 

+   160 

357 

12 

It 

620 

+ 

27 

+   199 

351 

13 

(1 

621 

+ 

27s 

+    71 

347 

14 

249 

622 

+ 

8 

39 

345 

14 

t( 

623 

+ 

72 

+     3 

340 

IS 

250 

624 

- 

65 

+    273 

336 

16 

(( 

625 

57 

151 

I 
II 

4-  .000067 
84 

-.001158 
-   IIS9 

335 

17 

251 

W. 

63s 

108 

+    270 

654 

+   116 

282 

637 

- 

63 

337 

682 

136 

292 

639 

+ 

93 

+   454 

715 

159 

305 

640 

+ 

77 

235 

724 

165 

309 

643 

- 

124 

281 

827 

240 

349 

644 

— 

83 

+    50 

841 

250 

355 

647 

+ 

193 

+    80 

I 
II 

-.0000456 
546 

—  .000919 

-  836 

883 

280 

372 

Nov.  29  E. 

648 

+ 

»3 

+   611 

380 

+     7 

247 

649 

+ 

17 

+    93 

377 

7 

it 

650 

+ 

97 

41 

371 

8 

1( 

651 

- 

6 

-    378 

368 

9 

248 

652 

- 

24 

125 

363 

10 

11 

653 

- 

273 

+    372 

359 

II 

tt 

654 

+ 

30 

241 

355 

12 

it 

6SS 

+ 

106 

193 

351 

12 

249 

656 

- 

24 

+    84 

347 

13 

tt 

6S7 

— 

10 

31 

343 

14 

" 

658 

+ 

69 

los 

I 
II 

-.0000165 
320 

-.004367 
-   4394 

338 

IS 

(1 

W. 

668 

124 

+   227 

646 

114 

280 

669 

- 

79 

+    27 

659 

123 

284 

670 

- 

84 

+   316 

672 

131 

288 

671 

— 

218 

+   181 

685 

140 

292 

672 

+ 

410 

6 

698 

149 

296 

673 

+ 

318 

-   348 

711 

156 

301 

674 

- 

173 

+    145 

728 

168 

307 

67s 

- 

48 

+    192 

741 

177 

3" 

676 

— 

70 

-    46s 

7S4 

185 

31S 

677 

- 

99 

18 

767 

194 

319 

678 

+ 

188 

—    264 

I 
II 

—  .000400 

-  402 

—  .004124 

-  4273 

+.000779 

+.000203 

+.000324 

72 


DETERMINATION   OF   THE    SOLAR   PARALLAX 
Table  VI.  —  Parallax  Plate  Constants  —  Continued. 


Plate  Constants. 

Standard 

Constants. 

Refraction  Constants.     I 

Date. 

Plate 
No. 

P 

r 

P 

r 

Mx 

My,Nx 

Ny 

Dec.  5  E. 

713 

__ 

D0019S 

+.000232 

+.000346 

+.000008 

+.000245 

714 

— 

70 

+   123 

342 

8 

" 

71S 

+ 

229 

+   269 

338 

9 

(( 

716 

+ 

429 

352 

334 

9 

tt 

717 

— 

505 

-   365 

330 

10 

246 

718 

+ 

124 

+   14s 

328 

10 

" 

719 

+ 

3 

+   144 

325 

II 

(( 

720 

+ 

274 

4-     4 

320 

II 

247 

721 

— 

208 

18 

316 

12 

722 

+ 

278 

+    28 

314 

13 

(( 

723 

355 

233 

I 
II 

-.000818 
6i8 

—.001918 
-  1818 

3" 

13 

u 

W. 

733 

+ 

78 

-    83 

609 

lOI 

274 

734 

— 

152 

+    15s 

621 

108 

278 

735 

+ 

241 

35 

633 

116 

282 

736 

- 

399 

+    395 

64s 

124 

28s 

737 

+ 

119 

52 

657 

132 

289 

738 

+ 

2 

97 

669 

140 

293 

739 

+ 

47 

+    320 

681 

147 

296 

740 

— 

106 

325 

693 

155 

300 

741 

+ 

149 

+    151 

705 

163 

304 

742 

+ 

55 

+    168 

717 

171 

307 

743 

+ 

4 

-    613 

I 
II 

—.000648 
-   36s 

—.001038 
957 

730 

178 

310 

Dec.  6  E. 

744 

+ 

106 

—    140 

+  .000344 

+.000007 

+.000245 

745 

— 

459 

+    636 

341 

7 

245 

746 

+ 

113 

—    264 

338 

8 

245 

747 

— 

255 

237 

334 

8 

245 

748 

— 

72 

95 

331 

9 

246 

749 

+ 

228 

371 

328 

10 

246 

750 

+ 

18 

132 

324 

10 

246 

7SI 

+ 

158 

I2S 

321 

II 

246 

752 

— 

82 

+   455 

318 

II 

247 

753 

+ 

2og 

—   no 

314 

12 

247 

754 

+ 

25 

+   371 
I 
II 

-.000541 
-   807 

+  .000226 
+   414 

3H 

12 

247 

W. 

764 

+ 

8 

459 

599 

98 

272 

76s 

- 

23 

266 

611 

los 

278 

766 

+ 

120 

166 

624 

113 

282 

767 

- 

51 

+    586 

636 

121 

28s 

768 

+ 

193 

+    315 

649 

129 

289 

769 

+ 

15 

+    466 

661 

137 

293 

770 

+ 

107 

150 

674 

144 

296 

771 

— 

193 

7 

686 

152 

300 

772 

+ 

222 

27s 

699 

160 

304 

773 

— 

97 

+    71 

711 

i68 

307 

774 

000284 

—  .000158 

I 
II 

—  .000876 

-  781 

+.001243 
+   1323 

+.000724 

+.000175 

+.000310 

PARALLAX   PLATE   CONSTANTS 
Table  VI.  —  Parallax  Plate  Constants  —  Continued. 


73 


Plate  Constants. 

Standard  Constants. 

Refractjon  Constants.     | 

Date. 

Plate 
No. 

P 

f 

P 

r 

Ms 

My.Nx 

Ny 

Dec.  7  E. 

77S 

—.000062 

+.OOOIS9 

+.000339 

+.000007 

+.000246 

776 

+ 

II 

+ 

S9 

336 

7 

n 

777 

+ 

89 

+ 

186 

333 

8 

" 

778 

- 

144 

- 

164 

329 

8 

247 

779 

— 

143 

— 

62 

326 

9 

u 

780 

+ 

46 

— 

456 

322 

10 

<( 

781 

+ 

42 

+ 

222 

318 

10 

(( 

782 

- 

SI 

- 

36 

31S 

II 

248 

783 

- 

57 

- 

281 

312 

12 

it 

784 

+ 

94 

+ 

287 

308 

12 

" 

78s 

+ 

131 

+ 

127 
I 
II 

-.000152 
432 

+.000077 
+   142 

305 

12 

ft 

W. 

796 

+ 

148 

— 

63 

579 

88 

269 

797 

— 

i6s 

+ 

352 

591 

94 

272 

798 

- 

91 

- 

37 

603 

lOI 

275 

799 

+ 

70 

+ 

437 

614 

108 

279 

800 

+ 

S3 

— 

20 

626 

"5 

282 

801 

27s 

- 

248 

638 

122 

28s 

802 

+ 

30 

- 

535 

649 

129 

289 

803 

+ 

231 

- 

66 

661 

136 

292 

804 

+ 

118 

+ 

125 

673 

143 

29s 

80s 

+ 

217 

+ 

269 

684 

150 

298 

806 

i^S 

212 
I 
II 

—.000647 
798 

+.001176 
+  1346 

695 

.  IS7 

301 

Dec.  24  E. 

89s 

_ 

243 

_ 

584 

291 

0 

250 

896 

+ 

148 

- 

167 

289 

0 

« 

897 

+ 

31 

+ 

523 

288 

0 

tt 

898 

- 

4 

+ 

357 

28s 

I 

ft 

899 

- 

5S 

+ 

104 

283 

I 

251 

900 

+ 

x8 

+ 

211 

281 

I 

« 

901 

+ 

92 

461 
I 
II 

-.000439 
-    650 

—.001611 
-  1980 

279 

2 

« 

W. 

908 

— 

93 

+ 

244 

704 

i8s 

325 

909 

+ 

160 

- 

25 

722 

196 

331 

910 

+ 

25 

— 

327 

740 

208 

337 

911 

- 

229 

- 

349 

763 

223 

346 

912 

+ 

II 

+ 

139 

781 

234 

352 

913 

+ 

I8S 

+ 

96 

799 

246 

359 

914 

60 

+ 

175 
I 
II 

-.000199 
410 

+.000522 
+   432 

+.000816 

+.0002S7 

+.000366 

74 


DETERMINATION   OF   THE   SOLAR   PARALLAX 


Table  VII.  —  Parallax  Mean  Places,  Reduction  to  Apparent  Place,  and  Parallax 

Corrections. 


Date. 

Plate 

No. 

Bekun 
M.  T. 

Mean  a  1900.  0. 

Mean  8  1900.  0. 

Reduction  to 
Apparent  Place. 

Parallax  A. 

irf. 

Second 

Second 

First  Deter- 

Deter- 

First Deter- 

Deter- 

8 

s 

lONATION. 

mina- 

MINA-nON. 

mina- 

a 

tion. 

tion. 

h    m    B 

h   m       s 

B 

0     /      // 

// 

Oct.    6  E. 

92 

17  21  41 

2  43  41.1056 

4I-IOIS 

46  52  59.930 

59-963 

-f6.096i 

-(-13.162 

-1.2563 

+5.149 

1.46 

93 

243s 

.0685 

.0690 

55     2.637 

2.669 

6.0962 

13.162 

I-2S34 

5.028 

1.46 

94 

27  22 

.0404 

.0402 

5-333 

5-335 

6.0964 

13.162 

1.2506 

4.916 

1.46 

95 

363s 

40.9633 

40.9595 

14.117 

14.100 

6.0965 

13-161 

1.2397 

4-539 

1.44 

96 

3936 

•9234 

-913s 

16.740 

16.746 

6.0966 

13.161 

I-23S7 

4.418 

1.44 

W. 

104 

2S  34  SO 

2  43  34.6084 

34.6084 

46  59  28.458 

28.393 

+6.1138 

-1- 13.222 

+0.8823 

—0.184 

1.03 

los 

39  47 

•5509 

•5489 

32.765 

32.758 

6.1140 

13.223 

0.9024 

0.040 

1.05 

106 

442s 

.4719 

-4750 

36.602 

36.557 

6.1142 

I3'223 

0.9207 

+0.098 

1.07 

107 

S3  10 

•3565 

-3590 

44.482 

44.418 

6. 1 144 

13.224 

0.9542 

0.365 

1. 11 

108 

5647 

•3313 

.3276 

47.80s 

47.811 

6.1146 

13-225 

0.9679 

0.480 

I-I3 

Oct.  12  E. 

134 

16  19  46 

2  41  18.0924 

18.1048 

48  56  29.784 

29-951 

-I-6.3931 

+14-422 

-1.4225 

+6.830 

1-59 

13s 

22  33 

.0236 

.0294 

32.018 

32.089 

6.3932 

14-423 

1.4222 

6.701 

1-59 

136 

26  10 

17.8602 

17.8698 

35-186 

35.216 

6.3933 

14-423 

1. 4216 

6.53s 

I-S9 

137 

33  43 

•7153 

.7224 

41-933 

41.959 

6.3935 

14-424 

1. 4189 

6.186 

I-S9 

138 

37  43 

.6047 

.6032 

45-326 

45-399 

6.3936 

14-425 

1. 4169 

6.002 

1-59 

139 

47    0 

.3888 

-3831 

53-772 

53-663 

6.3940 

14-427 

1.4106 

5-577 

1.58 

140 

SO  40 

.2625 

.2722 

56.592 

56.616 

6.3941 

14.428 

1.4075 

5-410 

1.58 

W. 

US 

2S  33  3S 

2  41     1. 1868 

I.1815 

49    4  17.640 

17-724 

-(-6.4120 

+14.522 

+  1.0925 

+0.107 

1.22 

146 

37  18 

1.0570 

1.0483 

20.697 

20.751 

6.4120 

14-523 

I-I07S 

0.240 

1.24 

147 

4S  22 

0.8157 

0.8043 

27.049 

27.120 

6.4123 

14.524 

1-1391 

0.534 

1.27 

148 

SI  22 

0.6330 

0.6255 

31-955 

31-947 

6.4125 

14.526 

1.1615 

0.758 

1.30 

Oct.  13  E. 

ISO 

16    8  44 

2  40  39-5839 

39.6007 

49  16  13.246 

13-057 

-I-6.4411 

+14.665 

-1.4154 

+  7.165 

1.61 

iSi 

12  58 

•5127 

.5288 

17. 191  17.049 

6.4412 

14.666 

1.4157 

6.966 

1.61 

IS2 

IS  33 

•4309 

.4501 

19-752 

19.615 

6.4412 

14.667 

1.4156 

6.844 

1.61 

IS3 

2844 

■0330 

-0565 

30-675 

30.560 

6.4414 

14.668 

1.4122 

6.372 

1.61 

W. 

163 

2S  40  33 

2  40  20.4728 

20.4651 

49  24    8.443 

8.563 

-(-6.4604 

+14.787 

+  1.1590 

+0.427 

1.29 

164 

43  10 

.3648 

.3683 

10.563 

10.697 

6.4604 

14.787 

1.1691 

0.551 

1.30 

i6S 

46  55 

.2608 

.2620 

13.553 

13.739 

6.4606 

14.788 

1.1833 

0.695 

1-31 

166 

54  35 

19.9894 

19.9902 

19-443 

19.541 

6.4607 

14.789 

1.2114 

0.991 

1-34 

167 

57  33 

.8684 

-8734 

21.477 

21.621 

6.4609 

14.790 

1.2220 

1. 109 

1.36 

168 

26    s  3S 

.6277 

-6347 

27.880 

27.989 

6.4611 

14.791 

1.2494 

1.430 

1.38 

169 

833 

.5282 

•5323 

30.394 

30.503 

6.4613 

14.792 

1.2591 

1.551 

1.40 

Oct.  14  E, 

170 

16  23  10 

2  39  56.1013 

56.0907 

49  35  59.53s 

59.292 

+6.4893 

+14.952 

-1.4718 

+6.290 

1.63 

171 

26  10 

55.9914 

55-9808 

36     1.902 

1.604 

6.4893 

14.952 

1.4704 

6.147 

1.62 

172 

30  22 

.8638 

•8494 

5.567 

5.378 

6.4894 

I4-9S3 

1.4680 

5-947 

1.62 

173 

43  43 

•4593 

•4344 

17.246 

16.917 

6.4896 

14-954 

1.4571 

5-315 

1.61 

174 

4635 

.3214 

.3181 

19579 

19.328 

6.4898 

14955 

1.4541 

S-179 

1.61 

17s 

55  35 

•0379 

•0274 

27.302 

27.079 

6.4900 

14.956 

1-4431 

4-756 

1.59 

176 

5850 

54-9495 

54-9355 

30.110 

29.807 

6.4901 

14.957 

1.4387 

4.605 

1.59 

177 

17    8  26 

•6274 

.6138 

38.060 

37.836 

6.4905 

14.960 

1.4238 

4.160 

1.57 

178 

II  26 

■4963 

.4968 

40.577 

40.218 

6.4907 

14.963 

1.4186 

4.021 

1.57 

W. 

187 

25  31  18 

2  39  35-8295 

35-8170 

49  43  25.957 

25-935 

■+6.5073 

+  15-063 

+  1.1616 

+0.206 

1.28 

188 

34  23 

.7168 

-7140 

28.190 

28.268 

6.5073 

15-064 

1.1740 

0.322 

1.29 

189 

39  20 

-5386 

•5334 

31-979 

31-984 

6.507s 

15-065 

1.1935 

0.511 

1.32 

190 

49  50 

.1679 

.1617 

40.02f 

40.123 

6.5078 

15.068 

1.2332 

0.924 

1.36 

191 

52  SO 

•0561 

.0489 

42.477 

42.566 

6.5079 

15.068 

1.2439 

1.044 

1-37 

192 

26    I    c 

34-7483 

34.7376 

48.695 

48.725 

6.5081 

15.07c 

1.2723 

1-377 

1.40 

193 

4  II 

-6438 

.6351 

50.782 

50.859 

6.5082 

15.071 

1.2830 

1.508 

1.41 

PARALLAX   MEAN  PLACES,   TRUE   PLACES,   AND   PARALLAX   CORRECTIONS 


75 


Table  VII.  —  Parallax  Mean  Places,  Reduction  to  Apparent  Place,  and  Parallax 

Corrections  —  Continued. 


Date. 

Plate 
No. 

Berlin 
M.  T. 

Mean  a  1900.  0. 

Mean  S  1900.  0. 

Reduction  to 
Apparent  Place. 

Parallax  A, 

TTf. 

Second 

Second 

First  Deter- 

Deter- 

First  Deter- 

Deter- 

s 

a 

mination. 

iona- 

mination. 

mina- 

a 

a 

TION. 

tion. 

h    m    a 

h  m       s 

s 

0     1      ff 

ff 

Oct.  IS  E. 

I9S 

16  23     0 

2  39     8.4177 

8.4139 

49  55     9-"6 

9. 118 

+6-5359 

+15-244 

-1. 4961 

-(-6.090 

1.64 

196 

27  33 

8.2S96 

-2531 

12-933 

12.931 

6.5360 

15-245 

1-4932 

5.870 

1.64 

197 

37  50 

7.9055 

7-8993 

21.716 

21.723 

6-5363 

15-245 

1-4845 

5-375 

1-63 

198 

40  46 

7.7892 

.7883 

24-183 

24.150 

6-5364 

15-247 

1.4816 

5234 

1-63 

199 

47  5° 

7-5374 

-5301 

29.980 

29.997 

6.5366 

ls-247 

1-4732 

4.896 

1.62 

201 

58  18 

7.1580 

•1539 

38-749 

38-765 

6-5369 

15-250 

1-4584 

4.400 

1.60 

202 

17     I  23 

7.0342 

-0329 

41.408 

41.389 

6-5371 

15-251 

1-4534 

4.256 

1-59 

W. 

213 

25  30  33 

2  38  46.4088 

46.403s 

50    2  2S.388 

25-378 

+6.5537 

+15-360 

-f  1. 1989 

-1-0.281 

1-31 

214 

33  33 

.2930 

.2906 

27-535 

27-535 

6-5537 

15-360 

1.2110 

0.400 

1-33 

215 

36  18 

.1801 

.1782 

29.822 

29.827 

6.5538 

IS-36I 

1. 2218 

0.508 

1-34 

216 

45  59 

45-7932 

45-7885 

37.620 

37-744 

6-S540 

15-363 

1.2587 

0.896 

1-38 

217 

48  21 

•7131 

-7047 

39-445 

39-481 

6-5542 

15-363 

1.2674 

0.992 

1-39 

218 

55  SO 

.4268 

-3976 

43-917 

43-987 

6-5544 

IS-363 

1-2938 

1-301 

1.42 

219 

59  21 

.2560 

•2533 

46.811 

46-787 

6-5544 

15-365 

1-3057 

1-449 

1-43 

220 

26    6  23 

44.9824 

44-9852 

51-695 

51.806 

6-5547 

15-366 

1.3288 

1.749 

1-45 

221 

9  " 

.8714 

.8839 

54-270 

54-283 

6-5548 

15-366 

1-3377 

1.869 

1.46 

Oct.  i6  E. 

222 

16  II  10 

2  38  16.7238 

16.7111 

SO  13  44-090 

44.166 

+6.5813 

+15-546 

-1-5263 

+6.456 

1.66 

223 

IS  20 

•5313 

-5199 

47-587 

47.700 

6.5815 

15-548 

1-5245 

6.251 

1.66 

224 

20  20 

•3541 

-3441 

51-713 

51-772 

6.5816 

15-549 

1-5217 

6.006 

1.66 

225 

28  so 

.0102 

15-9997 

58.649 

58.748 

6.5819 

15-550 

1-5151 

S-S88 

1.65 

226 

33  33 

IS. 8289 

-8123 

14     2.493 

2.601 

6.5820 

15-551 

1.5107 

5-358 

1.65 

227 

4033 

•5630 

-5526 

8.224 

8.298 

6.5822 

15-552 

1.5028 

5-017 

1.64 

228 

43  23 

-4474 

-4321 

10.607 

10.741 

6.5823 

15-552 

1-4993 

4.880 

1.63 

230 

54  21 

.0287 

.0140 

19.714 

19.776 

6.5827 

15-554 

1-4833 

4-540 

1.62 

W. 

239 

25  45  36 

2  37  51-7675 

51.7684 

50  21  11.066 

11.042 

+6.5992 

+15-677 

+  1-2975 

+  1.015 

1.41 

240 

49  47 

•5952 

.5918 

14.090 

14.012 

6.5993 

15-677 

1.3126 

1.191 

1-43 

241 

54  35 

.3819 

•3836 

17-635 

17-567 

6.599s 

15-678 

1-3293 

I -395 

I -45 

242 

26    043 

.1297 

.1291 

22.147 

22.097 

6.5997 

15.680 

1.3498 

1.661 

1-47 

243 

3  43 

50-9997 

.0011 

24.179 

24-134 

6.5998 

15.681 

1-3594 

1.792 

1.48 

244 

9  35 

■7509 

50.7548 

28.309 

28-255 

6.6000 

15.682 

1-3777 

2.052 

1-50 

Oct.  21  E. 

247 

15  57  35 

2  32  48-2349 

48.2346 

51  40     4.074 

4.067 

-1-6. 7901 

+  17-291 

-1-6565 

+5-968 

1-75 

248 

16    0  II 

.0844 

.0827 

5-729 

5.642 

6.7902 

17.292 

1-6545 

5-830 

1-75 

250 

13  27 

47-3548 

47-3573 

15-332 

iS-308 

6.7905 

17-295 

1.6404 

5-132 

1-73 

251 

19  18 

.0436 

-04S9 

19-417 

19-377 

6.7907 

17-297 

1.6323 

4-825 

1-73 

252 

22  59 

46.8464 

46.8477 

22.273 

22.200 

6.7907 

17.297 

1.6269 

4-634 

1.72 

253 

30  26 

.4092 

.4170 

27-536 

27-506 

6.7910 

17-300 

1.6143 

4-347 

1-71 

254 

33  36 

.2492 

•2487 

29.801 

29.790 

6.7910 

17-302 

1.6084 

4.084 

1.70 

W. 

264 

25  33  10 

2  32  13.9276 

13-9334 

SI  46  27.695 

27-731 

-1-6.8051 

+  17-449 

+  1.4623 

+  1-30S 

1-54 

265 

35  59 

-7707 

.7683 

29.701 

29-597 

6.8052 

17.440 

1-4724 

1-437 

1-55 

266 

3859 

-5962 

.6006 

31.176 

31-170 

6.8053 

17.441 

1.4829 

1-578 

1-56 

267 

47  34 

.0876 

•0855 

36.444 

36-433 

6.8055 

17-443 

1-5114 

1-988 

1-59 

268 

49  49 

12.9390 

12.9388 

37-888 

37-873 

6.8055 

17.444 

1. 5186 

2.098 

1.60 

269 

5842 

-4365 

-4323 

43-147 

43.086 

6.8057 

17.446 

1-5453 

2-S3I 

1-63 

270 

26     I  29 

.2889 

.2861 

45.008 

45-040 

6.8058 

17-446 

1-5532 

2.669 

1.64 

271 

8  22 

11.8872 

11.8824 

48-993 

48.989 

6.8060 

17.449 

1-5718 

3-013 

1.66 

Oct.  24  E. 

275 

16    OSS 

2  28  37.2076 

37-2125 

52  25     3.162 

3.109 

+6.8939 

+  18.527 

-1. 7172 

+4-964 

1-79 

276 

3  33 

.0489 

-0537 

4.848 

4.690 

6.8940 

18.527 

1-7133 

4.821 

1.78 

277 

633 

36.8706 

36.8724 

6-543 

6.494 

6.8940 

18.527 

1-7085 

4-657 

178 

278 

14  59 

.3108 

•3157 

12.071 

11-943 

6.8941 

18.530 

1.6936 

4.202 

1.76 

76 


DETERMINATION  OF  THE  SOLAR  PARALLAX 


Table  VII.  —  Parallax  Mean  Places,  Reduction  to  Apparent  Place,  and  Parallax 

Corrections  —  Continued. 


Date. 

Plate 
No. 

Berlin 
M.  T. 

Mean  a  1900.  0. 

Mean  8  igoo.  0. 

REDnCTJON    TO 

Apparent  Place. 

Parallax  A. 

irf. 

Second 

Second 

FiBST  Deter- 

Deter- 

First Deter- 

Deter- 

s 

s 

mination. 

mina- 

mination. 

mina- 

u 

0, 

tion. 

tion. 

b    m    s 

h  m      a 

s 

0     /      // 

tt 

Oct.  24  W. 

291 

2S  22  27 

2  27  58.5423 

58.5289 

52  30  30.002 

30.102 

-I-6.9061 

+18.698 

+  I-S543 

+1.422 

1.60 

292 

25  20 

•3330 

-3214 

31-548 

31.624 

6.9061 

18.700 

1-5647 

:    1-565 

1.62 

293 

28  27 

•1372 

.1256 

33-243 

33-367 

6.9062 

18.701 

1-5756 

1.720 

1-63 

294 

37  3S 

57.5262 

57-5157 

38-053 

38-157 

6.9065 

18.703 

1.6059 

2.182 

1.67 

29s 

40  17 

•360s 

•3497 

39-454 

39-480 

6.9065 

18.704 

1.6143 

2.319 

1.67 

296 

4842 

56.7736 

56.7604 

43-750 

43.829 

6.9067 

18.706 

1-6393 

2-753 

1.70 

297 

SI  42 

.5928 

■5836 

45.189 

45-344 

6.9067 

18.707 

1-6477 

2.910 

1. 71 

298 

5849 

.1087 

.1013 

49-027 

49-078 

6.9069 

18.710 

1.6664 

3.284 

I  73 

Oct.  26  E. 

319 

IS  4S  43 

2  25  30.3105 

30-3138 

52  51  25.561 

25.611 

+6.9520 

+19.404 

-1.7767 

+5.205 

1-83 

320 

4823 

•1357 

.1440 

26.884 

26.966 

6.9520 

19.406 

1-7732 

5.064 

1.82 

321 

5050 

29.9666 

29.9676 

28.409 

28.512 

6.9521 

19.407 

1-7695 

4.927 

1.83 

322 

S7  26 

.5160 

-5179 

32.284 

32.368 

6.9521 

19.408 

1-7587 

4-558 

1.81 

323 

16    037 

•2974 

•3023 

34-105 

34.209 

6-9523 

19.409 

1-7529 

4-382 

1.80 

324 

633 

28.8793 

28.8848 

37-409 

37-515 

6.9524 

19.411 

1.7414 

4.149 

1-79 

32s 

9  26 

.6641 

.6712 

39-183 

39-234 

6-9525 

19.412 

I-73S3 

3-896 

178 

326 

16  26 

.1724 

-1759 

43.298 

43-375 

6.9526 

19.414 

1-7195 

3-514 

1-77 

327 

20  10 

27.9110 

27.9183 

45-391 

45-414 

6-9527 

I9-4IS 

1-7103 

3-3" 

1.76 

W. 

336 

2S  32  33 

2  24  46.6903 

46.6943 

52  56  30.730 

30-643 

+6.9625 

+  I9-S9S 

+  1.6746 

+2.436 

1.72 

337 

3S  43 

•4599 

.4625 

32.281 

32.181 

6.9625 

19.596 

1.6842 

2.603 

1-73 

338 

3850 

•  2510 

.2494 

33-739 

33-651 

6.9625 

19.598 

1-6934 

2.770 

1-74 

339 

46  22 

45-7044 

45.7126 

37-057 

36.993 

6.9627 

19-599 

1.7142 

3-I7S 

176 

340 

49  21 

■4975 

•5034 

38-241 

38.177 

6.9627 

19.601 

1. 7219 

3-338 

1.77 

341 

s6so 

44.9476 

44.9642 

41.884 

41.877 

6.9629 

19.602 

1.7400 

3-747 

1.79 

342 

59  43 

•7313 

.7410 

42.964 

42-899 

6.9629 

19.603 

1-7465 

3-905 

1-79 

343 

26    7  59 

.1419 

-1504 

46.861 

46.746 

6.9631 

19.605 

1-7635 

4-364 

1.81 

344 

II  10 

43.9282 

43.9408 

48.205 

48.180 

6.9631 

19.608 

1.7694 

4-543 

1.82 

Oct.  29  E. 

34S 

IS  42  so 

2  20  21.0614 

21.0618 

53  25  26.783 

26.818 

+  7-0174 

+20.817 

-1.8320 

+4.441 

1.86 

346 

4S  22 

20.8674 

20.8659 

27.968 

28.014 

7.0174 

20.818 

1.8270 

4.296 

1.86 

347 

4835 

.6167 

.6117 

29.640 

29.656 

7-0174 

20.820 

1.8204 

4-115 

1.85 

348 

55  21 

.0961 

.0902 

32-651 

32.678 

7.0176 

20.821 

1-8052 

3-725 

1.83 

349 

5843 

19.8560 

19.8463 

34-419 

34-478 

7.0176 

20.822 

1-7972 

3.534 

1.83 

3SO 

16    s  18 

•318s 

•3152 

37-530 

37-595 

7.0176 

20.824 

1. 7801 

3-163 

1.81 

35 1 

811 

•1073 

.0990 

38.944 

39.004 

7.0176 

20.826 

1.7723 

3-003 

1.80 

W. 

3S7 

2$  46  29 

2  19  31.7521 

31.7677 

53  29  37-119 

37156 

+7.0244 

+  21.031 

+  1-8309 

+4115 

1.86 

358 

49  II 

.5609 

•5717 

38.102 

38.098 

7.0244 

21.029 

1.8366 

4.270 

1.86 

359 

S3    0 

•257s 

.2684 

39-556 

39-540 

7.0244 

21.028 

1.8442 

4.492 

1.87 

Nov.   3E. 

396 

IS  21  43 

2  10  490654 

49.0714 

S4    4  55-447 

55-270 

+7-0653 

+  23.336 

-1-9332 

+4.016 

1-93 

397 

2436 

48.8204 

48.8230 

56.189 

56.076 

7-0653 

23-336 

1.9263 

3-842 

1-93 

398 

27  33 

•5631 

•S59I 

57-044 

56.869 

7-0653 

23-337 

1.9190 

3.666 

1.92 

399 

34    0 

.0147 

.0277 

58.976 

58.819 

7-0653 

23-339 

1.9018 

3.281 

1.90 

400 

37  10 

47-7205 

47-7235 

5    0.013 

59-850 

7-0654 

23-340 

1.8898 

3-035 

1.89 

401 

43  23 

.2099 

.2092 

1.768 

1.670 

7.0654 

23-341 

1-8739 

2.727 

1.87 

402 

4633 

46.9032 

46.9124 

2-763 

2.619 

7-0654 

23-343 

1.8639 

2-543 

1.87 

404 

5647 

.0275 

■0303 

S-72S 

S.606 

7.0654 

23-345 

1.8287 

1-953 

1.83 

W. 

417 

2$  49  22 

2    9  52.6033 

52.6161 

54    7  14.649 

14.584 

+  7-0650 

+  23-566 

+2.0018 

+6.148 

2.00 

419 

5546 

-049s 

.0681 

15-753 

15-736 

7.0650 

23-569 

2.0079 

6-549 

2.01 

420 

26    0  28 

51.6625 

51.6780 

16.424 

16.462 

7.0649 

23-569 

2.0114 

6.844 

2.01 

421 

4  10 

-3486 

-3461 

16.816 

16.926 

7-0650 

23-570 

2-0135 

7.076 

2.01 

422 

9  33 

50.9220 

50-9343 

17.871 

17.831 

7.0649 

23-S7I 

2.0157 

7-415 

2.01 

423 

12  22 

.6762 

.6896 

18.222 

18.269 

7.0649 

23-572 

2.0163 

7-593 

2.01 

424 

17  43 

-2138 

.2105 

19.101 

19.116 

7.0649 

23-574 

2.0168 

7.929 

2.01 

42s 

2033 

49-9753 

49.9877 

19.162 

19-344 

7.0648 

23-575 

2.0165 

8.107 

2.01 

426 

2333 

-7364 

-7458 

19.977 

20.049 

7.0648 

23-576 

2.0160 

8.297 

2.01 

PAR7U.LAX   MEAN   PLACES,   TRUE   PLACES,   AND   PARALLAX   CORRECTIONS 


77 


Table  VII.  —  Parallax  Mean  Places,  Reduction  to  Apparent  Place,  and  Parallax 

Corrections  —  Continued. 


Date. 

Plate 
No. 

Berlin 
MX. 

Mean  0  igoo.  0. 

Mean  S  igcx).  0. 

Reduction  to 
Apparent  Place. 

Parallax  A. 

irf. 

Second 

Second 

First  Deter- 

Deter- 

First Deter- 

Deter- 

8 

S 

mination. 

mina- 

mination. 

mina- 

a 

a 

tion. 

tion. 

h    m    B 

h   m       9 

s 

0     /      „ 

" 

Nov.  10  E. 

472 

IS  10  11 

I  56  30.2241 

30.2162 

54  20    3.974 

4.040 

-1-6.9870 

+26.960 

—  1.9708 

+2.298 

1.96 

473 

13  10 

29.9293 

29.9319 

3-641 

3-799 

6.9870 

26.961 

1-9597 

2.116 

1-95 

474 

16  12 

.6996 

.6911 

4.089 

4.042 

6.9870 

26.961 

1.9480 

1-931 

1.94 

475 

23  29 

.0360 

.0185 

3-885 

3-975 

6.9870 

26.961 

1.9185 

1-493 

1.91 

476 

26     0 

28.8293 

28.8218 

4-015 

4.141 

6.9871 

26.960 

1.9079 

1-342 

1.89 

477 

32  II 

.2639 

.2569 

4.081 

4-139 

6.9871 

26.960 

1.8808 

0.978 

1.87 

478 

3S  10 

27.9868 

27.9748 

3-952 

4.118 

6.9871 

26.960 

1.8673 

0.804 

1.86 

W. 

495 

24  49  44 

I  55  36.9579 

36.9497 

54  19  22.443 

22.403 

+6.9773 

+27.167 

+  2.1070 

+5-295 

2.09 

496 

S3    0 

.6546 

.6451 

21.870 

21-995 

6.9773 

27.167 

2.1131 

5-521 

2.10 

498 

25    I  47 

35.8877 

35.8842 

20.514 

20.623 

6.9773 

27.169 

2.1266 

6.090 

2. II 

SOI 

14  10 

348473 

34-8409 

18.824 

18.860 

6.9772 

27.169 

2.1404 

6.914 

2.13 

Nov.  28  E. 

615 

14  SO  29 

I  28  53.0867 

53-0907 

SI  17    3.290 

3-239 

-1-6.2881 

+33-752 

-1.6385 

-1. 189 

I-7S 

616 

S3  29 

52-9857 

52.9846 

1-341 

1.264 

6.2881 

33-752 

1.6184 

1-344 

1.72 

617 

S6  II 

.8809 

.8797 

16  59.488 

59-452 

6.2880 

33-753 

1.6000 

1.484 

1.70 

618 

S9  22 

.7626 

•7651 

57-292 

57-191 

6.2879 

33-753 

1.5782 

1.646 

1.68 

619 

IS    2  II 

.6424 

-6483 

SS-247 

SS-183 

6.2878 

33-754 

1-5585 

1.788 

1.66 

620 

S43 

.5180 

-5198 

52.854 

52.789 

6.2877 

33-755 

1-5336 

1-963 

1.64 

621 

843 

•4013 

.4032 

50.670 

50.564 

6.2876 

33-754 

1.5121 

2.108 

1.61 

622 

II  22 

.3166 

•317s 

48.955 

48.841 

6.2876 

33-755 

1.4930 

2.233 

1-59 

623 

14  18 

.1974 

•1979 

46.913 

46-839 

6.2875 

33-755 

1.4714 

2.375 

1-57 

624 

1733 

■0749 

•0739 

44-697 

44.602 

6.2874 

33-756 

1.4474 

2.527 

1-54 

625 

20  22 

51-9730 

51.9693 

42.806 

42-724 

6.2873 

33-757 

1.4262 

2.656 

1-52 

W. 

635 

22  57  35 

I  28  34-6934 

34^6934 

SI  10  53-706 

53-706 

+6.2736 

+33-823 

+2.1569 

+5-742 

2.30 

637 

/23    3  18 
I23    3  34 

.4884 

•5057 

48.894 

49-113 

1   6.2733 

33-824 

12.1706 
I2.1713 

6.138 
6.158 

I2.32 

639 

10  24 

•2537 

•  2724 

43-335 

43-500 

6.2732 

33-826 

2.1858 

6.636 

2.34 

640 

12  27 

.2109 

.2212 

41-405 

41.340 

6.2731 

33-825 

2.1897 

6.779 

2.34 

643 

34  34 

33-5312 

33-5416 

23423 

23.538 

6.2725 

33-828 

2.2216 

8.347 

2.37 

644 

37  34 
I      3810 

.4500 

-4270 

20.845 

20.301 

}  6.2723 

33-829 

f2.2243 
\2.2247 

8.562 
8.603 

{2-38 

647 

4634 

•1577 

•  1623 

13-635 

13^659 

6.2721 

33-829 

2.2301 

9.205 

2.38 

Nov.  29  E. 

648 

14  41  22 

I  28  12.3428 

12.3442 

SO  59     5.268 

5.221 

+6.2467 

+33-946 

-1.6646 

-0.843 

1.79 

649 

44    0 

•2753 

•2713 

3-466 

3-423 

6.2466 

33-946 

1-6475 

0.983 

1-77 

650 

47  28 

.1521 

.1485 

0.871 

0.864 

6.2465 

33-947 

1.6243 

1.165 

1.74 

651 

SO    0 

.0780 

.0807 

58  59-348 

59-303 

6.2464 

33-947 

1.6074 

1.296 

1.72 

652 

S3  21 

11-9659 

11.9682 

56.897 

56-833 

6.2464 

33-946 

1-5845 

1.468 

1.70 

6S3 

S628 

•8530 

•8505 

54-627 

54-607 

6.2463 

33948 

1-5630 

1.628 

1.68 

654 

5936 

•7403 

•7444 

52-361 

52-310 

6.2461 

33-948 

I.54II 

1-784 

1.6s 

6SS 

IS    2  21 

.6569 

•6571 

50.357 

50.286 

6.2461 

33-948 

1-5215 

1. 916 

1.63 

656 

S3S 

.5626 

•5636 

48.052 

48.027 

6. 2460 

33-949 

1.4982 

2.073 

1.61 

657 

8  22 

.4636 

.4651 

45-962 

45.926 

6.2459 

33-949 

I.4781 

2.205 

1-59 

658 

11  11 

.3692 

-3700 

43-838 

43-773 

6.2458 

33-949 

1-4573 

2-338 

1-56 

W. 

668 

22  SI  21 

1  27  56.0922 

56.0950 

SO  52  41.048 

41.023 

+6.2323 

+34-011 

+  2.1478 

+5-734 

2.31 

669 

54  11 

.0051 

.0115 

38-579 

38.534 

6.2321 

34.011 

2-1550 

5-931 

2.32 

670 

57  33 

SS-9336 

55-9351 

3S-839 

35-877 

6.2320 

34-012 

2.1630 

6.164 

2.33 

671 

23    0  21 

•8655 

.8689 

33-680 

33-402 

6.2320 

34.012 

2.1693 

6-359 

2.33 

672 

336 

■7595 

.7672 

30.828 

30.852 

6.2319 

34013 

2.1764 

6-587 

2-34 

673 

643 

.6854 

•6855 

28.130 

28.138 

6.2318 

34-013 

2.1826 

6.805 

2-35 

674 

10  II 

•5958 

•5989 

25-273 

25.225 

6.2317 

34-013 

2.1891 

7.049 

2-35 

67s 

13  28 

•5007 

-5038 

22.359 

22.327 

6.2316 

34-014 

2.1948 

7.281 

2.36 

676 

16  29 

•4254 

.4269 

19.983 

19-957 

6.2315 

34-014 

2'i996 

7-494 

2.37 

677 

1943 

•3377 

-3431 

17.091 

17.008 

6.2314 

34-oiS 

2.2044 

7.724 

2.37 

678 

22  36 

.2652 

.2683 

14-587 

14-567 

6.2313 

34-016 

2.2082 

7-928 

2.37 

78 


DETERMINATION   OF   THE    SOLAR   PARALLAX 


Table  VII.  —  Parallax  Mean  Places,  Reduction  to  Apparent  Place,  and  Parallax 

Corrections  —  Continued. 


Date. 

Plate 
No. 

Berlin 
M.  T. 

Mean  a  igoo.  0. 

Mean  8  igoo.  0. 

Reduction  to 
Apparent  Place. 

Parallax  A. 

TTf. 

Second 

Second 

First  Deter- 

Deter- 

First Deter- 

Deter- 

8 

8 

mination. 

mina- 

mination. 

mina- 

a 

a 

tion. 

tion. 

h  m  s 

h  m   s 

s 

,  /   /, 

" 

Dec.  5  E. 

713 

1437  35 

I  26  27.1653 

27.1662 

48  58  47^638 

47-647 

+6.0180 

+34-709 

-1.4888 

-1. 198 

1.66 

714 

40  18 

•1794 

.1809 

45^792 

45-831 

6.0180 

34-710 

1.4697 

1.328 

1.64 

71S 

43  35 

•1565 

.1665 

42.912 

42945 

6.0179 

34-710 

1.4462 

1.483 

1.62 

716 

4635 

.1388 

.1478 

40^303 

40.314 

6.0178 

34-7" 

1-4245 

1.623 

1.60 

717 

49  " 

.1468 

•1533 

38.422 

38.557 

6.0178 

34-710 

1-4055 

1-743 

1-57 

718 

52  0 

.1128 

.1285 

35-766 

35-863 

6.0177 

34-710 

1.3848 

1.870 

1-55 

719 

55  0 

■0957 

.1073 

33-215 

33-241 

6.0177 

34-710 

1.3623 

2.004 

1-52 

720 

S8  28 

.0S09 

.0911 

30-318 

30.316 

6.0177 

34-7" 

1-3363 

2-155 

1-49 

721 

15  I  43 

.0640 

.0764 

27.367 

27.418 

6.0176 

34-710 

1-3114 

2-295 

1-47 

722 

4  29 

.0423 

.0502 

25.204 

25.208 

6.0I7S 

34-710 

1.2902 

2. 411 

1-44 

723 

7  43 

•0433 

•0531 

22.479 

22.546 

6.0174 

34-7" 

1.2652 

2.545 

1.42 

W. 

733 

22  14  36 

I  26  24.8148 

24.8134 

48  51  49-771 

49.672 

-1-6.0065 

+34-730 

+  2.0740 

+5-641 

2.32 

734 

17  29 

.8064 

.8136 

47.097 

46.980 

6.0064 

34-730 

2.0825 

S-837 

2-33 

735 

20  36 

.8129 

.8125 

43-959 

43-831 

6.0063 

34-731 

2.0912 

6.048 

2.34 

736 

23  36 

.7981 

.8120 

41.034 

40.952 

6.0063 

34-732 

2-0994 

6.252 

2-36 

737 

26  II 

•834s 

•8333 

38.692 

38.448 

6.0062 

34-731 

2 . 1 06 1 

6.430 

2-36 

738 

29  II 

.8140 

.8178 

35-577 

35-464 

6.0061 

34-731 

2. "34 

6.635 

2.37 

739 

32  43 

.8177 

.8279 

32.261 

32-175 

6.0060 

34-731 

2.1217 

6.879 

2-38 

740 

35  35 

.8168 

.8223 

29-549 

29-394 

6.0059 

34-731 

2.1281 

7.077 

2-39 

741 

3843 

.8243 

■8314 

26.515 

26.391 

6.0058 

34-730 

2.1346 

7-295 

2-39 

742 

41  29 

.8432 

.8474 

23.663 

23-554 

6.0057 

34-731 

2.1401 

7-487 

2.40 

743 

44  35 

.8324 

•8336 

20.738 

20.599 

6.0057 

34-731 

2.1458 

7-704 

2.41 

Dec.  6  E. 

744 

14  34  35 

I  26  33.1734 

33.1761 

48  37  5-569 

5-294 

+5.9846 

+34-764 

-1.4769 

—  1.098 

1.66 

745 

37  26 

.2027 

■1925 

3.107 

2.982 

5.9846 

34764 

1-4567 

1-234 

1.64 

746 

40  29 

.1639 

.1706 

0.118 

59-981 

5-9845 

34-765 

1-4350 

1-378 

1.62 

747 

43  II 

.1726 

.1668 

36  58.041 

57.900 

5.9844 

34-765 

1-4156 

1.502 

1-59 

748 

46  II 

.1716 

.1736 

55-264 

55-115 

5-9844 

34.766 

1-3936 

1.640 

I-S7 

749 

49  18 

.1418 

•  1477 

52.460 

52-333 

5-9843 

34-766 

1.3708 

1.779 

1-54 

750 

52  43 

■1529 

.1586 

49.426 

49-373 

5-9843 

34-765 

I-34S3 

1.930 

1-52 

751 

55  35 

•1536 

.1570 

46.966 

46.877 

5.9842 

34-766 

1-3237 

2-054 

1-49 

752 

5841 

■1473 

.1467 

44.263 

44-149 

5.9841 

34.766 

1.3000 

2.187 

1.46 

753 

IS  I  35 

.1540 

.1610 

41.816 

41-751 

5.9840 

34.766 

1.2778 

2.308 

1-44 

754 

4  35 

.1360 

.1414 

39-187 

39.078 

5^9839 

34.766 

1-2545 

2.431 

1.41 

W. 

764 

22  8  II 

I  26  32.891S 

32.8960 

4830  2.178 

2.183 

+  5^9745 

+34-781 

+  2.0575 

+5-589 

2.32 

76s 

II  35 

.9109 

.9101 

29  58.953 

58.918 

5-9744 

34-781 

2.0678 

5.818 

2-33 

766 

14  50 

•9249 

•9253 

55-700 

55-691 

5-9743 

34-782 

2.0772 

6.037 

2-35 

767 

17  41 

•9364 

.9416 

52-892 

52.890 

5-9741 

34-781 

2.0851 

6.231 

2.36 

768 

20  41 

■9546 

•9545 

49-792 

49.789 

5-9740 

34-783 

2.0930 

6-435 

2.36 

769 

23  35 

.9726 

•9743 

47.066 

47-058 

5-9739 

34.782 

2.1004 

6.633 

2-37 

770 

26  II 

.9908 

•9949 

44-508 

44.468 

5-9738 

34-783 

2.io66 

6.812 

2-38 

771 

2947 

33-0O7S 

33.0119 

40.945 

43-384 

5^9736 

34^782 

2.1149 

7.060 

2-39 

772 

32  28 

.0212 

.0219 

38.217 

38.195 

5^9735 

34782 

2.1208 

7-245 

2.40 

773 

35  43 

•0450 

.0496 

34-976 

34-988 

5^9734 

34.782 

2.1274 

7.469 

2.40 

774 

3843 

.0625 

.0648 

32.207 

32.225 

5-9733 

34-782 

2.1331 

7-678 

2.41 

Dec.  7  E. 

775 

14  36  i8 

I  26  45.7689 

45.7678 

48  14  54.057 

53924 

+5-9526 

+34-8o8 

-1.4318 

—  1.204 

1.63 

776 

39  35 

.7909 

•7903 

49-295 

51-370 

5-9525 

34.809 

1.4083 

1-356 

1.60 

777 

42  22 

•7903 

.7971 

48.804 

48.689 

5-9524 

34-809 

1.3881 

1-483 

1.58 

778 

45  II 

.8203 

.8212 

48.379 

46.272 

5-9524 

34-809 

1-3675 

1.609 

I-S5 

779 

48  II 

.8472 

•8437 

43.681 

43.612 

5-9523 

34.808 

1-3453 

1. 741 

1-53 

780 

52  43 

.8446 

•850s 

39.461 

39-348 

S-9523 

34.808 

1.3112 

1-937 

1-49 

781 

55  28 

.8659 

.8697 

37-184 

37.070 

5-9522 

34.809 

1.2904 

2-054 

1.46 

782 

58  21 

•8757 

■8730 

34-553 

34-431 

5-9S2I 

34.808 

1.2682 

2.174 

1.44 

783 

15  I  29 

.8779 

•8774 

31.662 

31.618 

5-9520 

34.808 

1.2440 

2-301 

1.41 

784 

4  43 

.8877 

.8894 

28.822 

28.707 

5-9519 

34.808 

1. 2186 

2.432 

1-38 

785 

7  35 

.9008 

.8981 

26.414 

26.248 

5.9519   34.808 

1. 1962 

2.543 

1.36 

PARALLAX  MEAN  PLACES,  TRUE  PLACES,  AND  PARALLAX  CORRECTIONS    79 

Table  VII.  —  Parallax  Mean  Places,  Reduction  to  Apparent  Place,  and  Parallax 

Corrections  —  Continued. 


Date. 

Plate 
No. 

Berlin 
M.  T. 

Mean  a  1900.  0. 

Mean  S  iqoo.  0. 

Reduction  to 
Apparent  Place. 

Parallax  A. 

irf. 

Second 

Second 

First  Deter- 

Deter- 

First Deter- 

Deter- 

8 

s 

mination. 

mina- 

mination. 

mina- 

a 

a 

tion. 

tion. 

h    m    8 

h    m       8 

8 

.     /      // 

</ 

Dec.  7  W. 

796 

21  57  46 

I  26  47-5192 

47-5161 

48    7  SS-095 

5S-I05 

+5-9426 

+34-820 

+  2.0270 

+5-267 

2.31 

797 

22     043 

•5346 

-5304 

52.298 

52-328 

5-9425 

34-820 

2.0368 

s-464 

2.32 

798 

3  43 

•5671 

.5684 

49-259 

49-263 

5-9425 

34-820 

2.0463 

5.662 

2-33 

799 

6  21 

•5996 

-5972 

46.706 

46.729 

5-9424 

34-821 

2.0542 

5-839 

2-33 

800 

9  40 

•6157 

.6143 

43-245 

43-278 

S-9423 

34-821 

2.0640 

6.062 

2-34 

80 1 

12  40 

.6616 

-6599 

40.212 

40.221 

59423 

34-820 

2.0724 

6.265 

2-35 

802 

IS  25 

.6908 

.6830 

37-443 

37-450 

S-9422 

34-820 

2.0798 

6.452 

2-37 

803 

18  40 

.7098 

•7075 

34-263 

34-271 

5.9422 

34.821 

2.0882 

6.672 

2.38 

804 

21  35 

■7337 

-7331 

31-295 

31-321 

5-9422 

34.822 

2.0954 

6.872 

2-38 

80s 

24  40 

.7722 

-7519 

28.227 

28.246 

S-9421 

34.822 

2.1026 

7.083 

2-39 

806 

27  45 

.8165 

.8119 

25-251 

25.219 

5-9420 

34.822 

2.1094 

7-295 

2.40 

Dec.  24  E. 

89s 

14  41    0 

I  46     6.6864 

6.6849 

41  18    8.717 

8.588 

-f-S-6240 

+32.808 

-0-9334 

-0.279 

1.20 

896 

44  47 

6.9589 

6.9580 

4.726 

4.608 

5.6240 

32.808 

•9045 

•392 

1.16 

897 

47    0 

7.1258 

7.1274 

2.35s 

2.342 

S-6239 

32.807 

.8875 

-4SS 

1. 14 

898 

50  21 

7-3821 

7-3795 

17  58.749 

58-677 

5-6239 

32.807 

.8617 

■550 

1. 10 

899 

53  29 

7.6065 

7.6073 

55-596 

55-477 

5-6239 

32.805 

-8372 

-636 

1.07 

900 

56  50 

7.8460 

7-8432 

52-014 

51.968 

5-6238 

32.804 

.8108 

.726 

1.04 

901 

59  34 

8-03  75 

8.0341 

49-303 

49-IS9 

5-6238 

32.804 

•  789s 

•795 

I.OI 

W. 

908 

21  283s 

I  46  36.9425 

36.9477 

41  10  43.025 

43.081 

+S-6211 

+32.734 

+  1.8926 

+8.605 

2-43 

909 

31  35 

37-1855 

37.1902 

39-510 

39.641 

5.6212 

32.734 

1.8996 

8.790 

2-44 

910 

34  II 

37-3813 

37-3896 

36.708 

36.724 

5.6211 

32.734 

1-9054 

8-951 

2-44 

911 

38  22 

37-7132 

37.7201 

32.031 

32.076 

5.6210 

32-733 

1.9143 

9. 211 

2.46 

912 

41  46 

37-9905 

37-9963 

28.no 

28.153 

5. 6210 

32-732 

1. 9210 

9.422 

2.46 

913 

44  43 

38.2190 

38.2249 

24.660 

24.702 

5.6210 

32-732 

1.9264 

9.608 

2.47 

914 

47  46 

38.4720 

38.4764 

21. 186 

21.267 

S.6210 

32-731 

1.9318 

9-799 

2.48 

8o  DETERMINATION  OF  THE  SOLAR  PARALLAX 

Table  VIII.  —  Parallax  Trde  Places  and  Corrections  to  Ephemeris. 


Observed  0. 

Interval 

Obliquity 

Pertur- 

O-E     1 

Date. 

Plate 

Epheuesis  a. 

Inter- 

Correc- 
tions TO 

Ecliptic 
Correc- 

bation 
Correc- 

No. 

First  De- 

Second  De- 

val. 

Epheue- 

tions  to 

tions  TO 

First 

Second 

TERlONAnON. 

termination. 

RIS. 

Epheme- 
ris. 

Epheme- 
ris. 

Determi- 
nation. 

Determi- 
nation. 

I 

900 

h  m    S 

h  m    s 

h  m   s 

b 

s 

s 

s 

s 

s 

Oct. 

6  E. 

92 

2  43  4S.94S4 

2  43  45.9413 

2  43  46.0058 

—.0180 

-f  .0026 

-.0450 

-.0491 

93 

45.9113 

45.9118 

45.9816 

(( 

tt 

549 

544 

94 

45.8862 

45.8860 

45-9582 

it 

ti 

566 

568 

95 

45.8201 

45-8163 

45.8813 

tt 

25 

457 

495 

96 

45-7843 

45-7744 

45-8558 

it 

n 

S60 

659 

W. 

104 

2  43  41.604s 

2  43  41.604s 

2  43  41.6644 

8.2 

—.0024 

-.0180 

-I-.00I9 

-.0414 

-.0414 

I  OS 

41.5673 

41.5653 

.6185 

8.2 

It 

(( 

327 

347 

106 

41.5068 

41.5099 

-5755 

8.3 

ti 

it 

502 

471 

107 

41.4251 

41.4276 

-4942 

8.3 

11 

(( 

506 

481 

108 

41.4138 

41.4101 

.4606 

8.3 

(( 

18 

282 

319 

Oct. 

12  E. 

134 

2  41  23.0630 

2  41  23.0754 

2  41  23.1483 

-.0210 

-.0123 

-.0520 

-.0396 

13s 

22.9946 

23.0004 

23.0777 

u 

124 

497 

439 

136 

22.8319 

22.8415 

22.9860 

« 

" 

1207 

mi 

137 

22.6899 

22.6970 

22.7942 

it 

(( 

709 

638 

138 

22.5814 

22.5799 

22.6928 

u 

11 

780 

795 

139 

22.3722 

22.3665 

22.4572 

it 

" 

516 

573 

140 

22.2491 

22.2588 

22.3641 

tt 

it 

816 

719 

W. 

MS 

2  41  8.6913 

2  41  8.6860 

2  41  8.7879 

9.2 

—.0027 

—  .0210 

-.0131 

-.0598 

-.0651 

146 

8.5765 

8.5678 

8.6894 

9-2 

it 

tt 

761 

848 

147 

8.3671 

8.3557 

8-4753 

9.2 

(( 

tt 

714 

828 

148 

8.2070 

8.199s 

8-3163 

9.0 

(( 

tt 

72s 

800 

Oct. 

13  E. 

ISO 

2  40  44.6096 

2  40  44.6264 

2  40  44.7696 

—  .0212 

-.0143 

-■1245 

-.1077 

151 

44-5382 

44-5543 

44.6495 

" 

'* 

758 

597 

1S2 

44-4565 

44-4757 

44.5761 

(( 

(( 

841 

649 

IS3 

44.0622 

44-0857 

44.2014 

(( 

144 

1036 

801 

W. 

163 

2  40  28.0922 

2  40  28.0845 

2  40  28.1909 

9-5 

-.0028 

—.0216 

—  .0151 

-.0592 

—  .0669 

164 

27-9943 

27-9978 

28.1140 

9-5 

(( 

ti 

802 

767 

i6s 

27.9047 

27.9059 

28.0027 

9-S 

(( 

ft 

585 

573 

166 

27.6615 

27.6623 

27.7755 

9-5 

ti 

It 

745 

737 

167 

27-5513 

27-5563 

27.6877 

9.6 

tt 

tt 

969 

919 

168 

27.3382 

27-3452 

27.4494 

9.8 

29 

tt 

152 

715 

645 

169 

27.2486 

27-2527 

27.3614 

9-7 

It 

(( 

731 

690 

Oct. 

14  E. 

170 

2  40  1.1188 

2  40  1. 1082 

2  40  I. 2188 

—  .0220 

—  .0163 

—  .0617 

-.0723 

171 

I. 01 03 

0.9997 

1.1241 

(( 

164 

754 

860 

172 

0.8852 

0.8708 

0.9917 

(1 

ti 

681 

825 

173 

0.4918 

0.4669 

0.570S 

(( 

tt 

403 

652 

174 

0.3571 

0-3538 

0.4799 

(( 

tt 

844 

877 

17s 

0.0848 

0.0743 

0.1958 

(( 

tt 

726 

831 

176 

0.0009 

39  59.9869 

0.0930 

(( 

tt 

537 

677 

177 

39  596941 

59.6805 

39  597898 

tt 

It 

573 

709 

178 

59-5684 

595689 

59-6949 

tt 

it 

881 

876 

W. 

187 

2  39  43-4984 

2  39  43-4859 

2  39  43-6178 

9.1 

.0027 

—  .0220 

—  .0171 

-.0776 

—  .0901 

188 

43-3981 

43-3953 

43-5168 

8.8 

26 

(( 

ti 

770 

798 

189 

43-2396 

43-2344 

43-3549 

8.9 

tt 

tt 

736 

788 

190 

42.9089 

42.9027 

43.0112 

8.9 

tt 

tt 

606 

668 

191 

42.8079 

42.8007 

42.9129 

8.9 

tt 

it 

633 

705 

19J 

42.5287 

42.5180 

42.645s 

8.9 

tt 

172 

750 

857 

193 

42.4350 

42.4263 

42.5414 

8.9 

tt 

it 

646 

733 

PARALLAX   TRUE   PLACES   AND   CORRECTIONS   TO   EPHEMERIS  8l 

Table  VIII.  —  Parallax  True  Places  and  Corrections  to  Ephemeris  —  Continued. 


Observed  0. 

Interval 

Obliquity 

Pertur- 

0 

-E 

Date. 

Plate 

Ephemeris  a. 

Inter- 

Correc- 
tions TO 

Ecliptic 
Correc- 

bation 
Correc- 

No. 

First  De- 
termination. 

Second  De- 
termination. 

val. 

£PH£ltE- 
RIS. 

tions  TO 
Epheue- 

tions  to 
Epheme- 

First 
Determi- 

Second 
Determi- 

RIS. 

ris. 

nation. 

nation. 

I  goo 

h  m   9 

h  m   9 

h  m   s 

h 

s 

s 

a 

9 

a 

Oct.  IS  E. 

iQS 

2  39  13-4575 

2  39  13-4537 

2  39  13.5867 

—  .0222 

-.0185 

-.0885 

-.0923 

196 

13.3024 

13-2959 

13.4289 

(( 

(1 

858 

923 

197 

12.9573 

12.9511 

13.0724 

(( 

186 

743 

805 

198 

12.8440 

12.8431 

12.9708 

It 

(( 

860 

869 

199 

12.6008 

12.5935 

12.7253 

" 

(( 

837 

910 

201 

12.2365 

12.2324 

12.3617 

it 

187 

843 

884 

202 

12.1179 

12.1166 

12.2550 

tt 

it 

962 

975 

W. 

213 

2  38  54.1614 

2  38  54-1561 

2  38  54.2841 

9-1 

—  .0027 

—.0226 

-.oig7 

-.0777 

-.0830 

214 

54°577 

54-0553 

54-1766 

9-1 

tt 

t 

** 

739 

763 

215 

53-9557 

53-9538 

54.0780 

9-1 

tt 

t 

(f 

773 

792 

216 

53-6059 

53.6012 

53-7307 

9-1 

tt 

t 

ft 

798 

845 

217 

53-5347 

53-5263 

53-6459 

9.0 

tt 

t 

tt 

662 

746 

218 

53-2750 

53-2458 

53-3771 

9-0 

tt 

f 

tt 

571 

863 

219 

53-"6i 

53-1134 

53-2509 

9.0 

tt 

t 

tt 

898 

925 

220 

52-8659 

52.8687 

52.9981 

9.0 

ft 

t 

tt 

872 

844 

221 

52-7639 

52.7764 

52.8975 

9.1 

it 

(( 

tt 

886 

761 

Oct.  i6  E. 

222 

2  38  21.7788 

2  38  21.7661 

2  38  21.8622 

-.0230 

-.0213 

-.0391 

-.0518 

223 

21.5883 

21.5769 

21.7048 

** 

It 

722 

836 

224 

21.4140 

21.4040 

21.5160 

{f 

214 

576 

676 

22s 

21.0770 

21.0665 

21.1944 

tt 

(( 

730 

835 

226 

20.9002 

20.8836 

21.0160 

tt 

tt 

714 

880 

227 

20.6424 

20.6320 

20.7511 

11 

tt 

643 

747 

228 

20.5304 

20.5151 

20.6439 

tf 

tt 

691 

844 

230 

20.1281 

20.1134 

20.2296 

tt 

tf 

571 

718 

W. 

239 

2  37  59-6642 

2  37  59.6651 

2  37  59.7931 

9.3 

-.0028 

-.0230 

—  .0221 

—  .0810 

-.0801 

240 

S9-5071 

59-5037 

59.6300 

it 

tt 

tt 

tt 

750 

784 

241 

59-3107 

59-3124 

59-4423 

it 

tt 

tt 

if 

837 

820 

242 

59.0792 

59.0786 

59.2029 

H 

** 

tt 

322 

757 

763 

243 

58.9589 

58.9603 

59-0855 

H 

(( 

It 

(( 

786 

772 

244 

58.7286 

58.7325 

58-8564 

tt 

(1 

tt 

tt 

798 

759 

Oct.  21  E. 

247 

2  32  53-3685 

2  32  53.3682 

2  32  53-5497 

-.0252 

-0313 

-.1247 

-.1250 

248 

53-2201 

53.2184 

53-4105 

(1 

tt 

1339 

1356 

250 

52-5049 

52.5074 

52.7002 

(( 

tf 

1388 

1363 

251 

52.2020 

52.2043 

52.3867 

(( 

tt 

1282 

1259 

252 

52.0102 

52.0115 

52.1896 

(1 

314 

1228 

1215 

253 

51-5859 

SI. 5937 

51.7902 

tt 

(( 

1477 

1399 

254 

51-4318 

5i.43>3 

51.6209 

ft 

ft 

1325 

1330 

W. 

264 

2  32  22.1950 

2  32  22.2008 

2  32  22.3915 

9-5 

-.0028 

-.0256 

-.0321 

-.1360 

--1302 

26s 

22.0483 

22.0459 

22.2373 

it 

" 

(( 

ti 

1285 

1309 

266 

21.8844 

21.8888 

22.0731 

tt 

(( 

ft 

(( 

1282 

1238 

267 

21.4045 

21.4024 

21.6029 

it 

tt 

tt 

" 

1379 

1400 

268 

21.2631 

21.2629 

21-4799 

It 

ft 

tt 

it 

1563 

1565 

269 

20.7875 

20.7833 

20.9933 

(t 

tt 

tt 

it 

1453 

1495 

270 

20.6479 

20.6451 

20.8407 

fi 

tt 

(( 

322 

1322 

1350 

271 

20.2650 

20.2602 

20.4635 

it 

tt 

tf 

« 

1379 

1427 

Oct.  24  E. 

27s 

2  28  42-3843 

2  28  42.3892 

2  28  42.6110 

—.0270 

-•0373 

—  .1624 

-.1575 

276 

42.2296 

42.2344 

42.4465 

tt 

tt 

1526 

1478 

277 

42.0561 

42.0579 

42.2593 

tt 

tt 

1389 

1371 

278 

41-5113 

41.5162 

41.7322 

tt 

tt 

1566 

1517 

8a  DETERMINATION   OF   THE    SOLAR   PARALLAX 

Table  VIII.  —  Parallax  True  Places  and  Corrections  to  Ephemeris  —  Continued. 


Observed  0. 

Init:rval 

Obuqutty   Pertue- 

O-E 

Date. 

Plate 

No. 

Efheueris  a. 

Inter- 

VAL. 

Correc- 
tions TO 
Epheme- 

ECLIPTIC       NATION 

First  De- 

Second De- 

Correc- 
tions TO 
Epheme- 

Correc- 
tions TO 
Ephesce- 

First 
Determi- 

Second 

DETERMi- 

termination. 

termination. 

ris. 

ris. 

BiS. 

nation. 

nation. 

1900 

h    m       s 

h    m      8 

h    m        s 

h 

8 

S 

s 

s 

> 

Oct.  24  W. 

291 

2  28     7.0027 

2  28    6.9893 

2  28     7.2247 

9.6 

-.0028 

—  .0270 

-.0381 

-■1541 

-•1675 

292 

6.8038 

6.7922 

7-0415 

(( 

it 

it 

1698 

1814 

293 

6.6190 

6.6074 

6.8436 

(( 

ft 

tt 

1567 

1683 

294 

6.0386 

6.0281 

6.2624 

l( 

tt 

tl 

1559 

1664 

29s 

5-8813 

5-8705 

6.0908 

(( 

tt 

it 

1416 

1524 

296 

5-3196 

5-3064 

5-SS53 

tl 

tl 

tt 

1678 

1810 

297 

5-1472 

5-1380 

5-3645 

ft 

It 

It 

1494 

1586 

298 

4.6820 

4.6746 

4.9117 

it 

n 

tt 

382 

1617 

1691 

Oct.  26  E. 

319 

2  25   35.4858 

2  25  35.4891 

2  25  35-7341 

—  .0280 

—  .0412 

-.1791 

-.1758 

320 

35-3145 

35-3228 

35-5642 

It 

({ 

1805 

;I722 

321 

35-1492 

35-1502 

35-3979 

tt 

(( 

1795 

1785 

322 

34-7094 

34-7113 

34-9495 

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tt 

1709 

1690 

in 

34.4968 

34-S017 

34-7331 

n 

tt 

1671 

1622 

324 

34-0903 

34-0958 

34-3300 

tt 

It 

1705 

1650 

32s 

33-8813 

33.8884 

34-1341 

11 

11 

1836 

1765 

326 

33-4055 

33-4090 

336583 

tt 

tl 

1836 

I80I 

327 

33-1534 

33.1607 

33-4046 

(1 

tl 

1820 

1747 

W. 

336 

2  24  55-3274 

2  24  55-3314 

2  24  55-5779 

9.8 

—.0029 

—  .0280 

—  .0416 

-.1780 

-.1740 

337 

55-1066 

55.1092 

55-3594 

(( 

<( 

tt 

tl 

1803 

1777 

338 

54-9069 

54-9053 

55-1444 

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it 

tt 

It 

1650 

1666 

339 

54-3813 

54-3895 

54.6248 

it 

It 

11 

tl 

1710 

1628 

340 

54.1821 

54.1880 

54.4190 

li 

tt 

tt 

11 

1644 

1585 

341 

53-6505 

53.6671 

53.9026 

n 

n 

tl 

It 

1796 

1630 

342 

53-4407 

53-4504 

53-7035 

it 

tl 

It 

tt 

1903 

1806 

343 

52-8685 

52.8770 

53-1329 

ti 

it 

tl 

tt 

1919 

1834 

344 

52.6607 

52.6733 

52-9131 

(f 

It 

tt 

tt 

1799 

1673 

Oct.  29  E. 

345 

2  20  26.2468 

2  20  26.2472 

2  20  26.5088 

—  .0292 

—  .0462 

-.1866 

-.1862 

346 

26.0578 

26.0563 

26.3184 

tl 

(( 

1852 

1867 

347 

25-8137 

25-8087 

26.0767 

tt 

tl 

1876 

1926 

348 

25-3085 

25-3026 

25.5686 

tt 

tt 

1847 

1906 

349 

250764 

25.0667 

25-3154 

tt 

It 

1636 

1733 

35° 

24-5560 

24-5527 

24.8208 

tt 

It 

1894 

1927 

3SI 

24-3526 

24-3443 

24.6040 

tt 

tt 

1760 

1843 

W. 

3S7 

2  19  40.6074 

2  19  40.6230 

2  19  40.8983 

9.9 

—.0029 

—  .0296 

—  .0466 

-.2118 

—  .1962 

358 

40.4219 

40.4327 

40.6931 

(( 

(( 

tt 

tt 

1921 

I8I3 

3S9 

40.1261 

40.1370 

40.4029 

" 

tt 

it 

tt 

1977 

1868 

Nov.    3E. 

396 

2  lo  54-1975 

2  10  54-2035 

2  10  54-4987 

-.0320 

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—.2161 

—.2101 

397 

53-9594 

53-9620 

54-2583 

(( 

{( 

2138 

2II2 

398 

53-7094 

53-7054 

54-0125 

(1 

tt 

2180 

2220 

399 

53-1782 

53-1912 

53-4747 

tt 

u 

2114 

1984 

400 

52.8961 

52.8991 

53-2105 

tt 

(( 

2293 

2263 

401 

52.4014 

52.4007 

52.6921 

tt 

532 

2055 

2062 

402 

52.1047 

52.1139 

52.4280 

tt 

(( 

2381 

2289 

404 

51.2642 

51.2670 

51-5744 

It 

(( 

2250 

2222 

W. 

417 

2  10     1. 6701 

2  10     1.6829 

2  10     2.0147 

lo.s 

.0000 

-.0320 

--0536 

-.2590 

—  .2462 

419 

1. 1224 

1.1410 

1-4779 

(( 

tt 

tt 

2699 

2513 

420 

0.7388 

0-7543 

1.0837 

It 

tt 

tt 

2593 

2438 

421 

0.4271 

0.4246 

0.7734 

tl 

it 

tt 

2607 

2632 

422 

0.0026 

0.0149 

0.3219 

tl 

tt 

tt 

2337 

2214 

423 

9  59-7574 

9  59-7708 

0.0856 

tt 

tt 

tt 

2426 

2292 

424 

59-2955 

59.2922 

9  59-6371 

tl 

It 

tt 

2560 

2593 

42s 

59-0566 

59.0690 

59-3998 

n 

tt 

tt 

2576 

2452 

426 

58.8172 

58.8266 

59.1480 

i( 

tt 

it 

It 

2452 

2358 

PARALLAX   TRXJE   PLACES   AND   CORRECTIONS   TO   EPHEMERIS  83 

Table  VIII.  —  Parallax  True  Places  and  Corrections  to  Ephemeris  —  Continued. 


Date. 

Plate 

No. 

Observed  0. 

Ephemeris  a. 

Inter- 
val. 

Interval 
Correc- 
tions TO 
Epheme- 
ris. 

Obliquity 
Ecliptic 
Correc- 
tions TO 
Epheme- 
ris. 

Pertur- 
bation 
Correc- 
tions TO 
Epheme- 
ris. 

O-E 

First  De- 
termination. 

Second  De- 

TERMINA-nON. 

First 
Determi- 
nation. 

Second 
Determi- 
nation. 

1900 

h    m         s 

h    m       s 

h    m        s 

b 

3 

8 

a 

a 

8 

Nov.  10  E. 

472 

I  56  35.2403 

I  56  35-2324 

I  56  35-5503 

-.0360 

—.0610 

-.2130 

—  .2209 

473 

34-9566 

34-9592 

35-2962 

il 

(( 

2426 

2400 

474 

34-7386 

34-7301 

35-0380 

tt 

(( 

2024 

2109 

475 

34-1045 

34.0870 

34.4180 

** 

it 

2165 

2340 

476 

33-9085 

33.9010 

34-2035 

it 

it 

1980 

2055 

477 

33-3702 

33-3632 

33-6778 

it 

it 

2106 

2176 

478 

33.1066 

33-0946 

33-4243 

It 

It 

2207 

2327 

W. 

495 

I  55  46.0422 

I  55  46-0340 

I  55  46-3127 

9.6 

.0000 

-.0360 

—  .0610 

-•1735 

-.1817 

496 

4S-7450 

45-7355 

46.0216 

11 

" 

it 

tt 

1796 

189I 

498 

44.9916 

44.9881 

45.2910 

ti 

tt 

it 

tt 

2024 

2059 

sot 

43.9649 

43-9585 

44.2409 

tt 

(( 

tl 

it 

1790 

1854 

Nov.  28  R. 

61S 

I  28  57-7363 

I  28  57.7403 

I  28  58.0156 

-.0430 

-.1112 

-.1251 

—  .1211 

616 

57-6554 

57-6543 

57-9230 

ti 

it 

"34 

"45 

617 

57-5689 

57-5677 

57-8399 

ti 

ft 

1168 

1 180 

618 

57-4723 

57-4748 

57.7420 

tt 

tl 

"55 

1 130 

619 

57-3717 

57-3776 

57-6553 

it 

it 

1294 

1235 

620 

57-2721 

57-2739 

57-5467 

tt 

It 

1204 

1 186 

621 

57.1768 

57-1787 

57-4549 

tl 

It 

1239 

1220 

622 

57.1112 

57.1121 

57-3730 

tl 

1113 

107s 

1066 

623 

57-0135 

57.0140 

57-2832 

11 

(( 

"54 

"49 

624 

56-9149 

56.9139 

57-1832 

ft 

(( 

1140 

1150 

62s 

56-8341 

56.8304 

57.0967 

tt 

tl 

1083 

1 1 20 

W. 

63s 
637 

I  28  43-1239 
42-9330 

I  28  43.1239 

I  28  43-3897 
43.2146 

8-3 

+.0014 

--0430 

tt 

—  .1119 

-.1123 
1281 

-.1123 

637 

42-9496 

43.2231 

tl 

** 

It 

(( 

1200 

639 

42.7127 

42-7314 

43-0151 

It 

(( 

tt 

tt 

1489 

1302 

640 

42.6737 

42.6840 

42-9553 

tl 

it 

it 

" 

1281 

1178 

643 

42-0253 

42-0357 

42.3101 

H 

it 

tt 

u 

1313 

1209 

644 

41.9466 

42.2224 

tt 

tl 

tl 

tt 

1223 

644 

41.9240 

42.2056 

" 

ti 

tt 

tl 

.... 

1281 

647 

41.6599 

41.6645 

41-9593 

(( 

tt 

tt 

tt 

1459 

1413 

Nov.  29  E. 

648 

I  28  16.9249 

I  28  16.9263 

I  28  17-2175 

-.0430 

-.1132 

-.1364 

--1350 

649 

16.8744 

16.8704 

17-1485 

It 

(( 

"79 

1219 

650 

16.7743 

16.7707 

17-0576 

It 

(( 

1271 

1307 

651 

16.7170 

16.7197 

16.9916 

tt 

tt 

1 184 

"57 

652 

16.6278 

16.6301 

16.9035 

It 

tt 

"95 

1172 

6S3 

16.5363 

16.5338 

16.8220 

tt 

tt 

1 29s 

1320 

654 

16.4453 

16.4494 

16.7405 

tt 

ft 

1390 

1349 

655 

16.3815 

16.3817 

16.6682 

tl 

ft 

1305 

1303 

656 

16.3104 

16.3114 

16.5836 

tt 

tt 

1170 

1 160 

6S7 

16.2314 

16.2329 

16.5108 

tl 

It 

1232 

1217 

658 

16.1577 

16.1585 

16.4374 

It 

1133 

1234 

1226 

W. 

668 

I  28    4.4723 

I  28    4.4751 

I  28    4.7618 

8.2 

-I-.0014 

-.0430 

-•"39 

-.1340 

-.1312 

669 

4.3922 

4-3986 

4.6920 

(( 

tt 

" 

tt 

1443 

1379 

670 

4-3286 

4-3301 

4.6092 

(( 

11 

(1 

tt 

1251 

1236 

671 

4.2668 

4.2702 

4-5403 

" 

i( 

(( 

tl 

1 180 

1 146 

672 

4.1678 

4-I7S5 

4.4602 

(( 

it 

(( 

tl 

1369 

1292 

673 

4.0998 

4.0999 

4-3834 

(( 

tt 

(( 

tt 

1281 

1280 

674 

4.0166 

4.0197 

4.2987 

it 

it 

tl 

ft 

1266 

1235 

675 

3-9271 

3.9302 

4.2176 

11 

'* 

It 

ft 

1350 

1319 

676 

3-8565 

3.8580 

4-1437 

it 

it 

tt 

ft 

1317 

1302 

677 

3-7735 

3-7789 

4.0642 

tl 

it 

it 

tt 

1352 

1298 

678 

3-7047 

3-7078 

3-9934 

tt 

It 

tt 

tt 

1332 

1301 

84  DETERMINATION   OF  THE   SOLAR  PARALLAX 

Table  VIII.  —  Parallax  True  Places  and  Corrections  to  Ephemeris  —  Continued. 


Date. 

Plate 
No. 

Observed  0. 

Ephemeris  0. 

Interval 
Correc- 
tions TO 
Epheme- 
ris. 

Obuquity 
Ecliptic 
Correc- 
tions TO 
Epheme- 
ris. 

Pertur- 
bation 
Correc- 
tions TO 
Epheme- 
ris. 

0- 

E 

First  De- 
termination. 

Second  De- 
termination. 

Inter- 
val. 

FmsT 
Determi- 
nation. 

Second 
Determi- 
nation. 

I  goo 

b    m       s 

h    m       s 

h    m       s 

h 

9 

s 

s 

s 

• 

Dec.    s  E. 

713 

I  26  31.6945 

I  26  31.6954 

I  26  32.0194 

-.0430 

-.1231 

-.1588 

-•1579 

714 

31.7277 

31.7292 

32.0242 

it 

(( 

1304 

1289 

715 

31.7282 

31-7382 

320300 

tt 

tt 

1357 

1257 

716 

31.7321 

31.7411 

32-0358 

ti 

tt 

1376 

1286 

717 

31-7591 

31-7656 

32.0408 

tt 

tt 

1156 

1091 

718 

31-7457 

31.7614 

32.0462 

tf 

it 

1344 

H87 

719 

31-75" 

31.7627 

32.0515 

tt 

tt 

1343 

1227 

720 

31.7623 

31-7725 

32.0582 

ti 

tt 

1298 

1 196 

721 

31.7702 

31.7826 

32.0646 

tt 

it 

1283 

1159 

722 

31.7696 

31-7775 

32.0700 

tt 

it 

1343 

1264 

733 

31-7955 

31-8053 

32.0763 

tt 

tt 

1147 

1049 

W. 

733 

1  26  32-8953 

I  26  32.8939 

I  26  33.1924 

8.  6 

+.0015 

-.0430 

--1234 

--1322 

-.1336 

734 

32-8953 

32.9025 

33.2020 

H 

It 

tt 

1418 

1346 

73S 

32.9104 

32.9100 

33.2121 

tt 

il 

tt 

1368 

1372 

736 

32.9038 

32.9177 

33.2221 

it 

* 

tt 

it 

1534 

1395 

737 

32.9468 

32.9456 

33-2309 

" 

tt 

tt 

1192 

1204 

738 

32-9335 

32.9373 

33-2409 

it 

tt 

tt 

1425 

1387 

739 

32.9454 

32.9556 

33-2525 

n 

tt 

tt 

1422 

1320 

740 

32.9508 

32.9563 

33-2622 

il 

tt 

it 

1465 

1410 

741 

32.9647 

32.9718 

33-2731 

it 

tt 

tt 

1435 

1364 

742 

32.9890 

32-9932 

33.2824 

t( 

It 

tt 

1285 

1243 

743 

32.9839 

32-9851 

33.2928 

<( 

tt 

tt 

1440 

1428 

Dec.    6  E. 

744 

I  26  37.6811 

I  26  37.6838 

I  26  37-9703 

-.0430 

—  .1241 

—.1221 

-•"94 

745 

37.7306 

37.7204 

37.9889 

tt 

tt 

0912 

1014 

746 

37-7134 

37.7201 

38.0084 

tt 

it 

1279 

1212 

747 

37-7414 

37-7356 

38.0260 

ti 

it 

"75 

1233 

748 

37.7624 

37-7644 

38-0452 

tt 

it 

"57 

"37 

749 

37-7553 

37.7612 

38.0652 

tt 

tt 

1428 

1369 

75° 

37-7919 

37.7976 

38.087s 

tt 

tt 

1285 

1228 

7SI 

37.8141 

37-8175 

38.1062 

tt 

tt 

1250 

1216 

752 

37-8314 

37-8308 

38.1263 

tt 

11 

1278 

1284 

753 

37.8602 

37.8672 

38-1455 

tt 

tt 

1182 

H12 

754 

37-8654 

37-8708 

38.1651 

n 

ft 

1326 

1272 

W. 

764 

I  26  40.923s 

I  26  40.9280 

I  26  41.2225 

8.6 

+•0015 

-.0430 

-.1244 

-•1^31 

-.1286 

765 

40.9531 

40-9523 

41.2490 

ti 

(( 

1300 

1308 

766 

40.9764 

40.9768 

41.2748 

tt 

(( 

1325 

1321 

767 

40.9956 

41.0008 

41.2980 

It 

(( 

1365 

1313 

768 

41.0216 

41.0215 

41-321S 

it 

n 

1340 

1341 

769 

41.0469 

41.0486 

41-3441 

tt 

It 

1313 

1296 

770 

41.0712 

41-0753 

41.3649 

it 

It 

1278 

1237 

771 

41.0960 

41.1004 

41-3935 

ft 

II 

1316 

1272 

772 

41-1155 

41.1162 

41.4148 

tt 

ti 

1334 

1327 

773 

41.1458 

41.1504 

41.4410 

tt 

tt 

1293 

1247 

774 

41.1689 

41.1712 

41.4650 

tt 

It 

1302 

1279 

Dec.    7  E. 

775 

I  26  50.2897 

I  26  50.2886 

I  26  50.5778 

-.0430 

-.1251 

—  .1200 

—.1211 

776 

50.3351 

50.3345 

50.6143 

41 

tl 

iiii 

1117 

777 

50.3546 

50.3614 

50.6454 

(1 

It 

1227 

"59 

778 

50.4052 

50.4061 

50.6766 

tt 

tt 

1033 

1024 

779 

50.4542 

50.4507 

50.7098 

tt 

It 

087s 

0910 

780 

50.4857 

50.4916 

50.7597 

tt 

It 

1059 

1000 

781 

50.5277 

50-5315 

SO.  7903 

tt 

11 

094s 

0907 

782 

50-5596 

50.5569 

50.8224 

tt 

tt 

0947 

0974 

783 

50.5859 

50.5854 

50.8572 

tt 

tt 

1032 

1037 

784 

50.6210 

50.6227 

50.8932 

tt 

11 

1041 

1024 

785 

50.6565 

50.6538 

50.9251 

tt 

It 

IOCS 

1032 

PARALLAX  TRLTE   PLACES   AND   CORRECTIONS   TO   EPHEMERIS  85 

Table  VIII.  —  Parallax  Thue  Places  and  Corrections  to  Ephemeris  —  Continued. 


Date. 

Plate 
No. 

Observed  a. 

Ephemeris  a. 

Inter- 
val. 

Interval 
Correc- 
tions to 
Epheme- 
ris. 

Obuquity 
Ecliptic 
Correc- 
tions to 
Epheme- 
ris. 

Pertur- 
bation 

0- 

-E 

First  De- 
termination. 

Second  De- 
termination. 

Correc- 
tions TO 
Epheme- 
ris. 

FlRST 

Determi- 
nation. 

Second 
Determi- 
nation. 

1900 

h    m       8 

h    m       s 

h    m       s 

b 

a 

s 

1 

s 

s 

Dec.   7  W. 

796 

I  26  55-4888 

I  26  55-4857 

I  26  55.7611 

7-4 

+.0013 

-.0430 

-.1254 

-.1052 

-.1083 

797 

53-5139 

55-5097 

55-7977 

H 

1167 

1209 

798 

5S-SSS9 

55-5572 

55-8355 

It 

1125 

1112 

799 

55-5962 

SS-5938 

55.8680 

(t 

1047 

1071 

800 

55.6220 

55.6206 

55-9092 

n 

1 201 

121S 

801 

55-6763 

55-6746 

55-9468 

n 

1034 

1051 

802 

55-7128 

55-7050 

55-9810 

(< 

lOII 

1089 

803 

55-7402 

55-7379 

56.0218 

" 

<( 

"45 

1168 

804 

55-7713 

55-7707 

56.0582 

tt 

1 198 

1204 

80s 

55.8169 

55-7966 

56.0968 

tt 

1128 

1331 

806 

55-8679 

55-8633 

56.1354 

tt 

1004 

1050 

Dec.  24  E. 

89s 

I  46  11.3770 

I  46  11-3755 

I  46  II. 6016 

-  .0360 

—  .1219 

—  .0667 

-.0682 

896 

11.6784 

11-6775 

11.9066 

tt 

it 

703 

712 

897 

11.8622 

11.8638 

12.0854 

tt 

tt 

653 

637 

898 

12.1443 

12.1417 

12.3557 

tt 

tt 

535 

561 

899 

12.3932 

12.3940 

12.6085 

tt 

tt 

574 

566 

900 

12.6590 

12.6562 

12.8787 

tt 

tt 

618 

646 

901 

12.8718 

12.8684 

13-0992 

tt 

tt 

69s 

729 

W. 

908 

I  46  44.4562 

I  46  44.46x4 

I  46  44.6684 

6.8 

-f-.0012 

—.0360 

—  .1216 

-•0558 

—.0506 

909 

44.7063 

44.7110 

44.9131 

(( 

1< 

tt 

504 

457 

910 

44.9078 

44.9161 

45-1254 

tt 

« 

tt 

612 

529 

911 

45-2485 

45-2554 

45-4668 

ti 

tt 

tt 

619 

S50 

912 

45-5325 

45-5383 

45-7447 

(( 

tt 

tt 

558 

500 

913 

45-7664 

45-7723 

45-9857 

tt 

tt 

tt 

629 

570 

914 

46.0248 

46.0292 

46.2346 

tt 

tt 

tt 

534 

490 

86 


DETERMINATION   OF   THE   SOLAR   PARALLAX 
Table  IX.  —  Star  Positions  used  in  Parallax  Work. 


Date. 

Stak. 

o  igoo.  O. 

5  igoo.  0. 

Authority. 

Date. 

Star. 

a  1900.  0. 

5  1900.  0. 

AtrrHORTTY. 

h   m       s 

0      t      It 

h    m       s 

.     ,      „ 

Oct.    6 

a 

2  43  18.309 

46  50  22.46 

A.  R.  Hinks 

Oct.  15 

a 

2  38  16.158 

49  54    S-66 

A.  R.  H. 

b 

43  17.367 

47    I  15-55 

Crossley 

b 

38  30.805 

57    9-06 

11 

c 

43  20.313 

46  57  54-98 

" 

f 

39  14-377 

51  57-83 

C( 

d 

43  34.583 

59  53-10 

A.  R.  H. 

g 

34-881 

53    7-32 

ti 

e 

43  42.884 

52    3-37 

*' 

h 

39-059 

58  56.52 

II 

f 

43  48.042 

47  10.04 

(( 

i 

48.887 

SO    0  33.83 

(1 

E 

43  54.418 

47    331-10 

" 

n 

39  59-657 

49  53  16.32 

<1 

h 

44  II. 017 

46  51  32-13 

11 

0 

38  27.981 

50     7  30.26 

It 

i 

44  28.897 

57  24-77 

(( 

1 

43  57.585 

42  12.97 

(( 

m 

43     8.890 

45  22.37 

" 

n 

43  38.445 

47  10  59.10 

(1 

0 

43     4.018 

10    4-25 

ii 

Oct.    12 

a 

2  40  25.259 

49    6    4.83 

A.  R.  H. 

Oct.  16 

a 

2  37  18.440 

50  24  35.32 

A.  R.  H. 

b 

40  46.648 

6  17.80 

il 

b 

40-523 

12  16.20 

11 

c 

40  55.416 

I  57-98 

t( 

c 

42-353 

16     1.70 

H 

d 

40  58.831 

48  53  55-59 

(t 

d 

37  53-126 

17  27.92 

tt 

e 

41  20.447 

49    2  11.39 

tl 

e 

38    4.868 

18  13.28 

11 

f 

41  26.331 

48  51  22.98 

(1 

f 

7.661 

25  43-50 

11 

S 

42  15.629 

49    4    0.13 

(1 

g 

12.844 

17  43.40 

11 

m 

41  25.409 

4848    6.34 

" 

h 

25-133 

1933.28 

(( 

n 

41  58.921 

46    7.19 

l( 

i 

50.890 

1459.57 

Crossley 

0 

.to    8.385 

49    8  23.94 

11 

1 

49-781 

II     8.68 

A.  R.  H. 

P 

41  57.534 

12  53-17 

H 

m 
n 
0 

38  27.981 
37  21.625 
37  56-528 

7  30.26 
27     1. 16 
29  42.10 

(I 
ti 
tt 

Oct.  13 

b 

2  39  33.241 

49  21  32-44 

Crossley 

Oct.  21 

a 

2  31  44-838 

51  49  24.71 

Crossley 

c 

40  15.60 

25  18.6 

A.  R.  H. 

b 

32     2.918 

45  47.04 

A.  R.  H. 

e 

40  39.87 

2331-5 

(( 

c 

14-579 

41  48.94 

11 

f 

40  48.788 

15  56.47 

It 

d 

25-609 

54  29.59 

11 

g 

40  53454 

21  21.82 

Crossley 

e 

30-685 

36  59.21 

11 

h 

40  54.71 

27  15-8 

A.  R.  H. 

f 

32  58.211 

37  33.41 

If 

m 

40    8.366 

8  23.49 

Crossley 

g 

33  11-541 

43  54.78 

11 

0 

39  30.284 

30  30-85 

A.  R.  H. 

h 

1 

m 

n 

0 

21.596 

30.965 

33  33-4" 

31  33-302 

32  39-465 

42  33.83 
37     3.48 
34  27.55 
57  12.78 
56  36-85 

tt 
tt 
it 
tt 
it 

Oct.  14 

a 

2  38  51.599 

49  34  54-85 

A.  R.  H. 

Oct.  24 

a 

2  27  16.861 

52  23  26.00 

A.  R.  H. 

b 

39  16.70S 

38  24.00 

Crossley 

b 

36-495 

33  17.66 

(( 

c 

30.284 

30  30.85 

A.  R.  H. 

c 

44-893 

24  21.73 

Crossley 

d 

31.890 

4045-31 

(( 

d 

27  52-139 

19  30.16 

A.  R.  H. 

e 

37-704 

47  29.68 

(( 

e 

28  18.59s 

30  38-02 

tl 

f 

42.818 

43  41-21 

" 

£ 

20.788 

27  54-33 

Ii 

g 

39  58.380 

37    8.87 

" 

g 

24.692 

ii  51-33 

tt 

h 

40    1.623 

47  58-01 

tl 

h 

40.461 

30  47-99 

tt 

i 

23.334 

40    4.66 

tt 

i 

28  54-428 

22  16.70 

It 

m 

40  53-14 

37  33-1 

" 

J 

29    3.641 

27  47.12 

II 

0 

39  59-43' 

51  17-06 

tt 

1 

m 
n 
0 

24.847 
29  19.304 
27     7-387 
27  40.966 

16  20.87 
21  18.78 

35  33-15 
38  51.82 

It 
tt 
tt 
tt 

STAR   POSITIONS   USED   IN   PARALLAX   WORK  87 

Table  IX.  —  Star  Positions  used  in  Parallax  Work  —  Continued. 


Date. 

Star. 

0.  1900.  0. 

S   IQOO.  0. 

Authority. 

Date. 

Star. 

a  igoo.  0. 

S  1900.  0. 

Authority. 

h    m       8 

0        f         /r 

h    m       s 

0     f      II 

Oct.  26 

a 

2  24  24.576 

52  55  11-43 

A.  R.  H. 

Nov.  29 

a 

I  26  48.651 

5058     5.12 

A.  R.  H. 

b 

55-838 

57    9-21 

tt 

b 

27  14.732 

S3    1.02 

ft 

c 

58-712 

54  53-96 

it 

c 

27  16.032 

52  13-88 

t( 

d 

24  58.963 

47  4791 

Crossley 

d 

28  23.488 

SI     I  26.91 

(( 

f 

25  29-245 

56  55-78 

A.  R.  H. 

e 

29.882 

SO  59  23.74 

tt 

g 

32.083 

51  50-15 

Crossley 

fi 

32.652 

48  54-39 

Crossley 

h 

31-215 

45  43-48 

it 

h 

32.660 

48  54.70 

A.  R.  H. 

1 

25  59-857 

46  26.08 

A.  R.  H. 

g 

42.774 

55  19-67 

Crossley 

m 

26     7.886 

49  30-40 

it 

h 

48.374 

56  44.66 

A.  R.  H. 

n 

24  30-170 

53    3  22.93 

a 

1 

28  18.361 

51     5  42.97 

" 

0 

23  57-327 

0  46.23 

ti 

m 
n 
0 

27  36.907 

30.022 

27  10.929 

9  21.30 

SO  42    0.70 

43  20.01 

tt 

it 

Oct.  29 

a 

2  19     3.966 

53  26  53.95 

A.  R.  H. 

Dec.    5 

a 

I  25  51.471 

48  51     2.88 

A.  R.  H. 

b 

14.044 

23  31.32 

tt 

b 

26  12.465 

47  54.65 

(1 

c 

17.214 

30  18.25 

tt 

c 

24.964 

57  53.26 

(( 

d 

19  41.747 

28  41. II 

It 

d 

30.780 

54  14.85 

(( 

e 

20    4.053 

31  43-54 

tt 

e 

40.665 

59  53.03 

tt 

f 

18.659 

2837-59 

ti 

f 

26  49.138 

49    4  59.76 

tt 

g 

17.698 

27  19.21 

tt 

g 

27    3-377 

48  51  11.90 

Crossley 

h 

36.315 

28  13.95 

tt 

h 

27  30.167 

58  56.58 

A.  R.  H. 

i 

39-714 

23  34-51 

it 

1 

26  50.532 

49  10  55.87 

ti 

1 

2031.617 

17    3-80 

a 

0 

26  44.949 

48  44  41.31 

it 

m 

21  21.501 

24  58.65 

It 

P 

27    8.327 

44  12.21 

it 

0 

18  34.133 

37  27-52 

a 

P 

1845-287 

27     7-74 

tt 

Nov.    3 

a 

2     941-252 

54    1    3-7S 

A.  R.  H. 

Dec.    6 

a 

I  25  52.056 

48  29    8.4s 

A.  R.  H. 

b 

9  4S-6oi 

7  50-31 

(( 

b 

53-842 

32  53.38 

tt 

d 

10    4-731 

8  14.72 

(( 

c 

26  22.548 

30  28.64 

it 

e 

10  42.388 

7  36.29 

(( 

d 

27-341 

33  35.32 

it 

f 

II     2.288 

6  21.36 

tt 

e 

58.064 

26  27.72 

ii 

- 

h 

II    6.889 

0    3.10 

tt 

f 

27    4-931 

39  47.14 

ti 

I 

II  54-635 

2  11.30 

tt 

g 

8.541 

26  36.90 

a 

m 

12    6.458 

5  44-66 

tt 

h 

16.197 

30  18.69 

a 

0 

9  16.540 

10  38.08 

tt 

1 

26  44.949 

4441.31 

ti 

P 

8  33-545 

II  47.76 

H 

m 
0 

27    8.327 
27  19.261 

44  12.21 
26  21.16 

tt 
it 

Nov.  10 

a 

I  55  16.378 

54  21  59.01 

Crossley 

Dec.    7 

a 

I  26  25.959 

48    4  36.11 

A.  R.  H. 

b 

16.978 

18  36.86 

A.  R.  H. 

b 

30.209 

9  25.01 

" 

c 

25.248 

14  33-59 

(( 

c 

34-284 

7    6.50 

tt 

d 

47-394 

18  12.56 

(1 

d 

43-127 

9  25.10 

ii 

e 

55  51-131 

23  40.71 

(( 

e 

26  44.108 

10    5.97 

it 

f 

56  34-218 

28  59.22 

Crossley 

f 

27    7.068 

II  46.14 

tt 

g 

35-581 

25  31.23 

A.  R.  H. 

g 

26  57.140 

16    4.51 

it 

h 

56  42-921 

22  33.93 

it 

h 

27  45-245 

10  28.54 

tt 

1 

57  12.806 

20  10.09 

a 

1 

26  58.064 

26  27.72 

tt 

m 

57  42-971 

22  39.69 

*' 

m 

27    8.541 

26  36.90 

tt 

P 

55    0.636 

21    3.05 

ti 

P 

27  24-625 

2    5.53 

(•) 

Nov.  28 

a 

I  27  42.885 

51  1647.67 

Crossley 

Dec.  24 

a 

I  45  31.946 

41  1837-87 

A.  R.  H. 

c 

28  34.347 

12  10.95 

A.  R.  H. 

b 

48.725 

6  24.92 

it 

e 

29    3-560 

7  46.25 

** 

c 

47-579 

13  46.44 

it 

f 

29  16.310 

6  55.65 

tt 

d 

50.488 

21  46.48 

it 

g 

29  25.865 

10  54.25 

It 

e 

46  18.675 

9  38.34 

ii 

h 

29  41.498 

16  52.75 

It 

f 

25.027 

8  20.77 

(*) 

m 

28  39.500 

28  49.68 

It 

g 

26.888 

7  29.69 

Crossley 

n 

28  18.361 

5  42.97 

(t 

i 

52.327 

15  29.08 

(t 

0 

27  36.907 

9  2130 

i< 

J 
1 

m 
P 

8.058 
45  54028 

45  35.559 

46  58.670 

13  44.52 
26    0.27 

23  55.83 
3  59.68 

A.  R.  H. 

1( 

'  Conference  Astrophotographique  Internationale  Circulaire  11,  12. 


88 


DETERMINATION   OF    THE    SOLAK   PARALLAX 
Table  X. — Selections  of  Stars  used  in  Reductions. 


Daii. 

First  Solution. 

Second  Solution. 

Oct.    6 

abcdefghi 

East 
West 

abcdefghilm 
abcdefghino 

12 

a b cdef  g 

E. 
W. 

abcdefgmn 
abcdegop 

13 

b  c  ef  g  h 

E. 
W. 

b  c  ef  ghm 
b  c  ef  gh  0 

14 

abcdefghi 

E. 
W. 

b  cd gim 
bd  ef  ho 

15 

a bfg h i 

E. 
W. 

a bf  ghin 
ab  hi  0 

16 

abcdefghi 

E. 
W. 

b  d  e  gilm 
ab  c  efg  hn  0 

21 

ab  c  d  ef  g  h 

E. 
W. 

bcefghlm 
ab  c  d  ef  hn  0 

24 

a  b  cd  ef  g  h  ij 

E. 
W. 

bdeghijlm 
bcefghno 

26 

abed ef  g h 

E. 
W. 

b c dfg him 
a b cfg n 0 

29 

abcdefghi 

E. 
W. 

cdefghilm 
abcdefgiop 

Nov.  3 

abed ef  h 

E. 
W. 

ab  d  ef  hi m 
ab  d  e  0  p 

10 

ab  c  d  ef  gh 

E. 
W. 

ad  e  g  hi m 
abcefgp 

28 

a c  ef  g h 

E. 
W. 

a  c  ef  ghm 
a c efg n 0 

29 

ab  c  def  gh 

E. 
W. 

abed efg h I m 
ab  c  d  ef  gh  n  0 

Dec.   s 

ab  c  d  ef  gh 

E. 
W. 

abed efl 
abcdegop 

6 

abed ef  g h 

E. 
W. 

a  b  c  d  fl  m 
ab  c  d  e  gh  0 

7 

abed ef  g h 

E. 
W. 

abcdefglm 
abed efg p 

24 

ab  cd  ef  g  ij 

E. 
W. 

acdehijlm 
efgijp 

DERIVATIONS   OF   CORRECTIONS   TO   ASSUMED   PARALLAX  89 

Table  XI.  —  Derivations  of  Corrections  to  Assumed  Parallax. 


Date. 

Nos.  Plates  Combined. 

(E-W)'- 

IS  cos  J 

(E-W)". 

Sirf. 

Att. 

Weight. 

East. 

West. 

First 
Detekw- 

Second 
Determi- 

First 
Determi- 

Second 
Determi- 

First 
Deter- 

Second 
Deter- 

mina- 

mina- 

NATION. 

nation. 

nation. 

nation. 

tion. 

tion. 

• 

> 

// 

// 

// 

It 

Oct.    6 

92 

104 

-.0036 

-.0077 

10.24 

-.0369 

-.0788 

2.49 

-.ois 

-.032 

12.S 

93 

los 

—      222 

-    197 

-.2273 

—  .2017 

2SI 

-    91 

-    80 

17.6 

94 

106 

-        64 

-      97 

-    6S5 

-    993 

2.S3 

-    26 

-    39 

12.7 

9S 

107 

+      49 

-       14 

+      S°2 

-    143 

2.S5 

-f    20 

-      6 

iS-3 

96 

108 

-     278 

-    340 

--.2847 

-.3482 

2S7 

—  Ill 
-.045 

-  13s 
-.058 

12.8 

Oct.I2 

134 

MS 

+.0078 

+  -02SS 

9.84 

+  .0768 

+.2509 

2.81 

+.027 

-(-.090 

22.S 

13s.  6 

146 

-       91 

+      73 

-      89s 

+    718 

2.83 

-    32 

+      25 

22.6 

137.8 

147 

-       30 

+    112 

-      29s 

-t-.II02 

2.86 

—    10 

+    39 

28.6 

139,  40 

148 

+      S9 

+    1S4 

+    S8i 

+-ISIS 

2.88 

+    20 
+.001 

+    S3 
+.052 

31-7 

Oct.  13 

ISO 

163 

-•0653 

—  .0408 

9.76 

-•6373 

-.3982 

2.90 

—  220 

-•137 

11.6 

IS! 

164,  S,  6,  7 

+      17 

+    152 

+    166 

+.1484 

2-9S 

+      6 

+    SO 

20.7 

»Sa 

x68 

—     126 

4 

-  1230 

-      39 

2.99 

-    41 

—      I 

17.9 

153 

169 

-    30s 

—     Ill 

-  2977 

-.1083 

3.01 

-    99 
-.088 

-    36 
-.031 

iS-i 

Oct.  14 

170,1,2 

187 

+.0092 

+.0098 

9.71 

+.0893 

+.0952 

2.90 

+•031 

+•033 

26.1 

173 

188 

+    367 

+     146 

+■3564 

-f.1418 

2.90 

+.123 

+    49 

I4S 

174 

189 

-    108 

-       89 

-.1049 

-    864 

2-93 

-    36 

-    30 

234 

I7S 

190 

—    120 

-     163 

-.1165 

-•1583 

2-9S 

-    39 

-    S4 

14.8 

176 

191 

+      96 

+       28 

+    932 

+    272 

2.96 

+    31 

+      9 

11.8 

177 

193 

+    177 

+     148 

+■1719 

+•1437 

2.97 

+    S8 

+    48 

II.9 

178 

»93 

-    23s 

-     143 

-.2282 

-.1389 

2.98 

-    77 
+.013 

-    47 
+.001 

17.9 

Oct.  IS 

19s 

213 

-.0108 

-.0093 

9-6s 

—.1042 

-.0897 

2.9s 

-•03s 

-•030 

11.8 

196 

214 

-    119 

—     160 

-.1148 

-•IS44 

2.97 

-    39 

-     S2 

17.8 

197 

aiS 

+      30 

-       13 

+    290 

-      I2S 

2.97 

+      lO 

-       4 

17.8 

198 

216 

-      62 

-       24 

-    598 

-    232 

301 

—    20 

-  08 

18.1 

199 

217 

-     I7S 

-     164 

-.1689 

-•IS83 

301 

-    56 

-    S3 

iS-i 

30I 

218, 19, 20 

-      63 

7 

-    608 

-      68 

303 

—    20 

—      2 

21.2 

303 

331 

-      76 

-    214 

-    733 

-.2065 

30s 

-    24 
-.026 

-    68 
-.031 

12.2 

Oct.  16 

222,3 

239 

+.02S4 

+.0124 

9-S8 

+•2433 

+.1188 

3-07 

+.079 

+■039 

iS-4 

224,  s 

240 

+      97 

+      28 

+    929 

+    268 

309 

+    30 

+      9 

27.8 

226 

241 

+    123 

-      60 

+.1178 

-    S7S 

3.10 

+    38 

-    19 

18.6 

227 

242 

+     114 

+      16 

-I-.1092 

+    IS3 

3" 

+    35 

+      S 

iS-6 

338 

243 

+      9S 

-      72 

+    910 

—    690 

3" 

+    29 

—    22 

iS-6 

230 

344 

+    227 

+      41 

+-2I7S 

+    393 

3.12 

+    70 
+.047 

+    13 
-t-.0O4 

21.8 

Oct.  21 

247 

264 

+.0113 

+.0052 

9.29 

+.1050 

+.0483 

3-29 

+.032 

+.01S 

23.0 

248 

26s 

-      S4 

-      47 

-     502 

-    437 

330 

-    IS 

-    13 

16.S 

3SO 

366 

—    106 

-      I2S 

-  98s 

—.1161 

3-29 

-    30 

-    3% 

16.4 

as  I 

267 

+      97 

+    141 

+   901 

+.1310 

332 

+    27 

+    39 

23.2 

253 

268,9 

+    280 

+    3^S 

-t-.26oi 

-f.2926 

3-34 

+    78 

+    88 

23-4 

2S3 

270 

-    iSS 

-      49 

-.1440 

-    4SS 

3-3S 

-    43 

-    14 

16.7 

2S4 

371 

+      S4 

+      97 

+      S02 

+    901 

336 

+    IS 
+.009 

+    27 
+.015 

16.8 

Oct.  24 

27s 

291,2 

—  .0004 

+.0169 

914 

-.0037 

+  -IS4S 

3-40 

—  .001 

+-04S 

20.4 

276 

293.4 

+      37 

+    196 

+  338 

+•1791 

3-43 

+      lO 

+     52 

27.4 

277 

29s.  6 

+    is8 

+    296 

+.1444 

+.270S 

346 

+    42 

+    78 

27.7 

278 

297,8 

-      10 

+    121 

-    91 

+.1106 

348 

-      3 

+.0X2 

+    32 
+.052 

27.8 

90  DETERMINATION   OF   THE   SOLAR   PARALLAX 

Table  XI.  —  Derivations  of  Corrections  to  Assumed  Parallax  —  Continued. 


Date. 

Nos.  Plates  Combined. 

(E-W)'- 

IS  cos  J 

(E-W)". 

2irf. 

At. 

Weight. 

East. 

West. 

First 
Determi- 
nation. 

Second 
Determi- 
nation. 

First 
Determi- 
nation. 

Second 
Determi- 
nation. 

First 
Deter- 
mina- 
tion. 

Second 
Deter- 
mina- 
tion. 

Oct.  26 

319 

336 

5 

—  .oon 

a 
-.0018 

9-os 

—  .0100 

-.0163 

3^55 

-.003 

-.005 

21.3 

320 

337 

—            2 

+      55 

-       18 

+    498 

3-55 

—       I 

+    14 

17.8 

321 

338 

-      145 

-    119 

-.1312 

-.1077 

3^56 

-    37 

-    30 

14.2 

322 

339 

-f-            I 

-      62 

+        9 

-    561 

357 

0 

-     16 

25.0 

323 

340 

-         27 

-      37 

-     244 

-    335 

3^57 

-      7 

-       9 

14-3 

324 

341 

+         91 

—       20 

+    824 

-    181 

3-58 

+    23 

-      5 

21^5 

32s 

342 

+        67 

+      41 

+    606 

+    371 

3^57 

+    17 

+    10 

21.4 

326 

343 

+         83 

+      33 

+    751 

+    299 

3^58 

+    21 

+      8 

17.9 

327 

344 

—         21 

-      74 

-    190 

—    670 

358 

-      5 

-l-.OOI 

-    19 
-.006 

143 

Oct.  29 

34S>6 

357 

+.0259 

-I-.0098 

8.93 

+  •2313 

+•0875 

3^72 

-f-.o62 

+■024 

40.9 

347,8 

358 

+      59 

-     103 

+    527 

—    920 

3^70 

+  14 

-    25 

33-3 

349.50.51 

359 

+    214 

+      34 

-f.i9ii 

+    304 

3-68 

+  52 
+.043 

+      8 
-I-.002 

40.5 

Nov.    3 

396 

417 

+.0429 

-I-.036I 

8.80 

+  ■3775 

+•3177 

3^93 

-f.096 

-I-.081 

27-S 

397 

419 

+    561 

+    401 

+•4937 

+•3529 

3^94 

+•125 

+    90 

27.6 

398 

420 

+    413 

+    218 

+•3634 

-I-.1918 

3-93 

+  92 

+    49 

19.6 

399 

421,2 

+    358 

+    439 

+•315° 

+.3863 

393 

-1-  80 

+    98 

27-5 

400 

423 

+    133 

+      29 

+.1170 

+    255 

390 

+  30 

+      7 

19s 

401 

424 

+    505 

+    531 

+•4444 

+•4673 

3^88 

+•115 

-1-  120 

19.4 

402 

42s 

+    19s 

+    163 

+  •1716 

+•1434 

3.88 

+    44 

+    37 

19.4 

404 

426 

+    202 

+    136 

+  •1778 

+•1197 

384 

+    46 
+.078 

+    31 
-f-.o64 

19.2 

Nov.  10 

472,3 

495 

-•0543 

-.0487 

8.75 

-■4751 

—  .4261 

4-os 

-.117 

-.IDS 

243 

474 

496 

-    228 

-    218 

-•1995 

-.1908 

4.04 

-    49 

-    47 

20.2 

47S 

498 

-    141 

-    281 

-•1234 

-•2459 

4.02 

-    31 

-    61 

24.1 

476,7,8 

SOI 

-    308 

-    332 

-.269s 

-.2905 

4.00 

-    67 
-.066 

-    73 
-.071 

28.0 

Nov.  28 

61S 

635 

-.0128 

-.0088 

9-39 

—  .1202 

-.0826 

4^05 

-.030 

—  .020 

28.4 

616 

637 

+    147 

+      55 

+.1380 

+    S16 

4.04 

+    34 

+    13 

32.3 

617 

639 

+    321 

+    122 

+•3014 

-f.1146 

4.04 

+    75 

+    28 

16.2 

618 

640 

-t-    126 

+      48 

+•1183 

+    451 

4.02 

+    29 

+    II 

28.1 

619,  20 

643 

+      64 

—        I 

+    601 

9 

4.02 

+    IS 

0 

44.2 

621,  2 

644 

+      66 

+    138 

-t-    620 

-I-.1296 

398 

+    16 

+    33 

47.8 

623,4.5 

647 

+    333 

+    273 

+•3127 

+.2563 

3-92 

-1-    80 
+.031 

+    65 
+.019 

549 

Nov.  29 

648 

668 

—.0024 

-.0038 

9-45 

—  .0227 

-•0359 

4.10 

—.006 

-.009 

24.6 

649 

669 

-1-    264 

-t-    160 

+•2495 

+.1512 

4.09 

+    61 

+    37 

20.4 

650 

670 

—      20 

-      71 

-    189 

-    671 

4.07 

-      5 

-    16 

16.3 

651 

671 

4 

—      II 

-      38 

—    104 

4^05 

—      I 

-      3 

16.2 

652 

672 

+     174 

+    120 

+  .1644 

+•1134 

4.04 

+    41 

+    28 

20.2 

653 

673 

-       14 

-      40 

-    132 

-    378 

4^03 

-      3 

-       9 

24.2 

654 

674 

-     124 

-    114 

—  .1172 

-.1077 

4.00 

-    29 

-     27 

28.0 

6SS 

67s 

+      45 

+      16 

+    425 

+    151 

399 

+    II 

+      4 

27.9 

656 

676 

+    147 

+    142 

+•1389 

+  1342 

3-98 

+    35 

+    34 

35-8 

657 

677 

-1-    120 

+      81 

+•1134 

+    765 

3^96 

+    29 

+    19 

27.7 

658 

678 

+      98 

+      75 

+    926 

+    709 

3^93 

+    24 
+.014 

+     18 
+  •007 

19.7 

DERIVATIONS   OF   CORRECTIONS   TO   ASSUMED   PARALLAX  9I 

Table  XI.  —  Derivations  of  Corrections  to  Assumed  Parallax  —  Continued. 


Date. 

^os.  Plates  Combined. 

(E-W)'- 

15  cos  S 

(E-W)". 

Sirf. 

Air. 

Weight. 

East. 

West. 

First 
Determi- 
nation. 

Second 
Determi- 
nation. 

First 
Determi- 
nation. 

Second 
Determi- 
nation. 

First 
Deter- 
mina- 
tion. 

Second 
Deter- 
mina- 
tion. 

s 

s 

« 

// 

// 

ft 

Dec.    s 

713 

733 

-.0266 

-.0243 

9.86 

-.2623 

-.2396 

3-98 

-.066 

—.060 

27.0 

714 

734 

+    it4 

+      57 

+.1124 

+    562 

3-97 

+    28 

+    14 

27.8 

71S 

735 

+      II 

+    115 

-1-    108 

+■1134 

396 

+      3 

+    29 

27.7 

716 

736 

+    158 

+    109 

+.1558 

+•1075 

3-96 

+    39 

+    27 

31-7 

717 

737 

+      36 

+    113 

+    355 

-t-.ni4 

3-93 

+      9 

+    28 

23.6 

718 

738 

+      81 

-1-    200 

+    799 

+•1972 

392 

+    20 

+    5° 

19.6 

719 

739 

+      79 

+      93 

+    779 

+    917 

3-9° 

+    20 

+    24 

19-5 

720 

740 

+    167 

+    214 

-f.1647 

-f  .2110 

3.88 

+    42 

+    54 

31.0 

721 

741 

+    152 

+    20s 

+•1499 

-I-.2021 

3-86 

+    39 

+      52 

23.2 

722 

742 

-      58 

—      21 

-    572 

-     207 

3-84 

-     IS 

-      5 

30.7 

723 

743 

+    293 

+    379 

-t-  2889 

+■3737 

3-83 

+    75 
+.018 

+    98 
+.028 

30-6 

Dec.    6 

744 

764 

+  .0110 

+.0092 

9-93 

+.1092 

+.0914 

398 

+.027 

+.023 

27.9 

74S 

765 

+    388 

+    294 

+.3853 

+.2919 

3-97 

+    97 

+    74 

31.8 

746 

766 

+      46 

+    109 

+    457 

+.1082 

3-97 

+     12 

+    27 

27.8 

747 

767 

+    190 

+      80 

+.1887 

+    794 

3-95 

+    48 

+    20 

27.7 

748 

768 

+    183 

+    204 

+.1817 

+.2026 

3-93 

+    46 

+      52 

27-5 

749 

769 

-    115 

-      73 

-.1142 

-    72s 

391 

-     29 

-    19 

313 

7SO 

770 

7 

+        9 

-      70 

+      89 

3-90 

—       2 

+      2 

234 

751 

771 

-t-      66 

+      56 

+    655 

+    556 

3-88 

+     17 

+    14 

27.2 

752 

772 

+      56 

+      43 

+    556 

+    427 

3-86 

+     14 

+    II 

27.0 

753 

773 

+    III 

+    135 

-)-.II02 

+  1341 

384 

+     29 

+    35 

30-7 

754 

774 

-      24 

+        7 

-      238 

+      70 

3.82 

-      6 
+.023 

+      2 
+.022 

30.6 

Dec.    7 

775 

796 

—.0148 

-.0128 

10.00 

-.1480 

-.1280 

3-94 

-.038 

-.032 

27.6 

776 

797 

+      56 

+      92 

+     560 

+    920 

3-92 

+    14 

+    23 

31-4 

777 

798 

—    102 

-      47 

—  .1020 

-    470 

391 

-    26 

—    12 

27.4 

778 

799 

+      14 

+      47 

+      140 

+    470 

3-88 

+       4 

+    12 

19.4 

779 

800 

+    326 

+    30s 

+.3260 

+.3050 

3.87 

+     84 

+    79 

27.1 

780 

801 

-         2S 

+      SI 

-      250 

+    510 

3-84 

-      7 

+    13 

26.9 

781 

802 

+      66 

+    182 

+     660 

+.1820 

3-83 

+    17 

+    48 

23-0 

782 

803 

+    198 

+    194 

+  .1980 

+.1940 

3-82 

+      52 

+    SI 

22.9 

783 

804 

+    166 

+    167 

-f.i66o 

+.1670 

3-79 

+    44 

+    44 

26.5 

784 

80s 

+      87 

+    307 

+    870 

+.3070 

3-77 

+     23 

+    81 

26.4 

78s 

806 

—        I 

+      18 

—      10 

+    180 

3-76 

0 
+.015 

+      5 
+.028 

30.1 

Dec.  24 

895 

go8 

—  .oiog 

—  .0176 

11.28 

-.1230 

-.1985 

363 

-•034 

-•055 

25-4 

896 

909 

-     199 

-    255 

-.2245 

-.2876 

3.60 

-    62 

-    80 

25.2 

897    ■ 

910 

-      41 

-    io8 

—    462 

-.1218 

3-S8 

-     13 

-    34 

14-3 

898 

911 

+      84 

—      II 

+  948 

-    124 

3-S6 

+     27 

-      3 

21.4 

899 

912 

-      16 

-      66 

-  180 

-    744 

3-53 

-     S 

—    21 

28.2 

900 

913 

+        IX 

-      76 

+   124 

-    8S7 

351 

+      4 

-    24 

21. 1 

901 

914 

-    161 

-    239 

-.1816 

—.2696 

3-49 

-     52 
-.019 

-    77 
-.042 

17.4 

92  DETERMINATION  OF  THE  SOLAK  PARALLAX 

Table  XII. —  Positions  of  Faint  Stars  Derived  from  Crossley  Plates. 


Date. 

Plate 
No. 

SlAK. 

0  1900.  0. 

S  iQoo. 0 . 

No.  OF 

Images. 

Remarks. 

1900 
Oct.    9 

123 
123 
125 

U 

h    m       s 

2  42  S4-470 
.482 
.488 

0     /       // 

+47  53  39-89 
■85 
•75 

5 
4 
4 

122 
123 
125 

Xl 

2  42  48.637 
.628 
-653 

47  55    516 
•13 
.10 

5 
4 

4 

Faint. 

122 

X2 

2  42  50.090 

47  55  35-92 

5 

• 

122 
123 

y 

2  43     I-IS7 
.169 

47  56     7-79 
•94 

5 

4 

123 

123 
1 25 

z 

2  43     2.621 
.604 
.617 

47  54  49-92 
.82 

•71 

5 
4 

4 

Faint. 

Oct.  10 

129 
130 

X 

2  42  14.987 

•999 
iS-oos 

48  21  47.79 
-79 
-53 

3 
5 
3 

Oct.  IS 

204 
205 
207 

X 

2  39    3-154 
.136 
•133 

49  52  32-85 
.62 
-70 

4 
5 
5 

Very  faint. 

Oct.  16 

232 
235 
236 

X 

2  38    4.007 
3-998 
4.002 

SO  17  13.90 
.89 
.69 

4 
4 
3 

Very  faint. 
Very  faint. 

Oct.  21 

258 
266 
267 
268 

X 

2  31  35-526 
-534 
-513 
•537 

SI  52  23.19 
22.83 

23-19 
22.86 

2 

2 

4 

I 

Faint. 
Very  faint. 

Very  faint. 

258 
348 
250 

y 

2  33  36-723 
.739 
.718 

51  28  48.20 
•IS 

.33 

3 
3 
3 

Faint. 

Oct.  26 

329 
331 

X 

2   2S      4-230 
.249 

52  57  21.05 
30.71 

4 
3 

Image  I  very  faint. 

Oct.  39 

353 
354 
355 

X 

3  20  15-254 
.214 
.307 

53  23  21.51 
.46 
.70 

3 
3 
3 

Faint. 
Faint. 

353 
354 
355 

y 

3  30  16.376 
.378 
.365 

S3  23  44-27 
.68 
•76 

3 
3 
3 

Faint. 
Faint. 

354 
355 

z 

2  18  43-359 
•370 

S3  34    S-OS 
•43 

3 
3 

Nov.  I 

360 
361 
362 

X 

2  13  43-196 
.319 
.308 

53  53  36-14 
•13 
.16 

5 
3 
3 

Images  of  plate  generally  distorted. 

360 
361 

y 

3  14  46.894 
.874 

S3  54  16.04 
.14 

5 
3 

Very  faint  and  distorted. 
Faint. 

360 
361 
362 

z 

2  14  54-137 
.179 
.189 

53  49  3470 
-50 
-58 

5 
3 
3 

Faint  and  distorted. 

POSITIONS   OF   FAINT   STARS   DERI\rED   FROM   CROSSLEY  PLATES  93 

Table  XII.  —  Positions  of  Faint  Stars  Derived  from  Crossley  Plates — Continued. 


Date. 

Plate 
No. 

Star. 

0  1900.  0. 

S  1900.  0. 

No.  OF 

Images. 

Rehabjcs. 

Nov.     2 

384 
385 
386 

z 

b     m       s 
2  13     5.086 

•125 

.178 

+  53  58     7-90 
.61 

-87 

4 

4 
4 

Very  poor  images  —  faint  and  distorted. 

«       »         ((              tt      t(          tt 

<4            «               It                       «           «                 U 

Nov.    3 

408 
411 
414 

X 

2    10  47.656 
.685 
.684 

54    3  42.91 

-92 

43.00 

S 
4 
3 

Nov.    5 

445 
447 
450 

y 

2    6    8.760 

.691 
•705 

54  13  59-79 

14    0.01 

0.21 

5 
5 
4 

Image  I  poor. 

Nov.  10 

486 
487 

t 

I   56  30.481 

•475 

54  19  35.79 
.76 

5 
5 

486 
487 
492 

w 

I  56  57-193 
.182 
.181 

54  22  36.14 

35-58 

•55 

5 
5 
5 

486 
487 
492 

X 

I  55  48-955 
.941 
.985 

54  20  17.09 
.08 

.13 

S 
S 
S 

486 

487 
492 

y 

I  SS  50-385 

.356 
■444 

54  20  10.29 
•30 
.66 

5 
S 
5 

Faint  and  distorted. 

486 
487 
492 

z 

I  SS  53-842 

.883 
-877 

S4  20  10.92 
.70 
.88 

5 
5 
5 

Nov.  12 

518 

519 
520 

X 

1  SI  43.617 
•593 
-583 

54  12  11.29 
11.00 
It. 26 

3 
3 
4 

S18 

519 
520 

z 

I  52  49-954 
•930 
.920 

54  14  40.58 
.66 
•74 

3 
3 

4 

Nov.  13 

538 

t 

I  48  46.131 

54    7  32.96 

3 

538 
539 
540 

u 

I  50  57556 
•S70 
.581 

54  12    o.ss 
.86 
•83 

3 
S 
5 

538 
539 
540 

V 

I  49  10.162 

•  151 
.164 

54    8  21.19 

.2094 

•92 

3 
5 
5 

538 
539 
540 

w 

I  so  45-256 

-239 
.276 

54    7  33^95 
3421 
33-88 

3 
5 
S 

Dec.    2 

679 
681 

z 

I  26  48.030 
-051 

50    8    7.94 
8.33 

3 
3 

Dec.  II 

848 

X 

I  28  54.83s 

46  48  35-43 

5 

APPENDIX. 


DESCRIPTION    OF   THE    MEASURING-ENGINE. 

This  engine  was  constructed  by  the  firm  of  Stackpole  &  Brother,  New  York,  from 
designs  by  Professor  William  Harkness,  of  the  U.  S.  Naval  Observatory.  As  no 
account  other  than  the  paragraph  on  page  76,  vol.  i,  Lick  Observatory  Publications, 
has  been  published,  it  seems  desirable  to  include  a  short  description  here. 

The  engine  is  intended  for  the  measurement  of  plates  6x6  inches  or  smaller,  at  one 
setting,  either  by  rectangular  or  by  polar  coordinates,  with  the  plates  in  a  horizontal 
position  only.  The  accompanying  illustration  will  make  plain  its  general  features  as 
used  in  the  Eros  work.  It  is  of  brass  throughout  (excepting  the  screws)  and  is  very 
solidly  built. 

A  micrometer-microscope  and  a  small  transit  telescope  are  provided  with  the  engine. 
The  transit  telescope  is  used  to  test  the  straightness  of  the  slides.  A  spirit-level,  extra 
microscope-objectives,  and  eye-pieces  are  also  provided. 

The  machine  is  provided  with  a  circle  12  inches  in  diameter,  divided  on  silver  to  5' 
and  read  by  verniers  to  s".  On  this  circle  is  fastened  a  glass  stage  to  carry  the  negative 
to  be  measured.  Two  slides  and  scales,  approximately  parallel  to  the  X  and  Y  axes, 
respectively,  permit  of  the  determination  of  both  rectangular  coordinates  simultaneously. 

The  setting-telescope  containing  a  fixed  glass  reticle  is  attached  rigidly  to  the  car- 
riage moving  along  the  X-axis.  This  carriage  and  its  ways  are  in  turn  attached  to  a 
larger  one  which  moves  along  the  Y-axis.  Clamps  and  slow-motions  are  provided  in 
both  cases. 

The  scales  are  of  glass  and  read  by  microscopes  rigidly  fixed  to  the  telescope  car- 
riages. The  divisions  of  the  glass  scales  are  0.02  inch  apart  and  are  identified  by  means 
of  auxiUary  silver  scales.  The  microscopes  for  reading  the  glass  scales  have  glass 
reticles  which  enable  readings  to  be  made  directly  to  0.00 1  inch  and  by  estimation  to 
o.oooi  inch. 

Scale  A  is  used  to  measure  X-coordinates ;  scale  B,  to  measure  Y-co6rdinates. 

The  errors  of  scale  A  were  investigated  in  the  Department  of  Weights  and  Measures, 
U.  S.  Coast  and  Geodetic  Survey.  The  results  of  the  investigation  are  printed  in 
vol.  Ill,  part  III,  of  the  Lick  Observatory  Publications. 

Using  scale  A  as  a  standard,  the  errors  of  divisions  100  to  260,  inclusive,  of  scale  B 
were  determined  by  Dr.  H.  K.  Palmer.  These  results  have  not  been  printed  heretofore. 
They  are  given  at  the  end  of  this  paper.  For  the  sake  of  convenience,  the  numerical 
results  for  scale  A  are  also  given. 

The  errors  of  both  scales  have  been  found  to  be  so  small,  in  the  portions  used  in  the 
Eros  work,  as  to  be  neghgible. 

This  measuring-engine  had  been  in  use  for  a  number  of  years  prior  to  the  com- 
mencement of  the  Eros  measurements.  During  this  time  several  difficulties  had  become 
apparent.  The  one  which  gave  most  trouble  was  the  illumination.  This  defect  could 
not  be  remedied  without  reconstructing  the  entire  stage  for  carrying  the  negatives.  As 
the  stage  provided  with  the  engine  was  of  weak  design,  an  entirely  new  one,  with  more 
convenient  illumination,  was  made  in  the  Lick  Observatory  shops  and  attached. 

95 


96 


DETERMINATION   OF   THE   SOLAR  PARALLAX 


lW/ 


The  clamps  and  slow-motions  for  the  circle  and  its  vernier  were  badly  placed.  The 
slow-motion  screw  for  the  vernier  was  in  front  where  it  was  occasionally  displaced 
accidentally  by  the  observer.  This  was  remedied.  The  clamp  and  slow-motion  for  the 
circle  (and  attached  negative)  were  changed  to  a  more  convenient  position. 

The  slides  of  this  engine  are  not  exactly  at  right  angles.  The  deviation  amounts  to 
ii'  30".  If  we  face  the  A  scale  of  the  engine,  looking  along  the  longer  slides  (Y-axis) 
and  across  the  shorter  slides  (X-axis)  the  inclination  is  such  as  to  cause  the  upper  left- 
hand  and  lower  right-hand  angles  to  be  l«ss  than  90°,  by  11'  30".  A  negative  made  in 
the  ordinary  way,  where  proper  orientation  in  the  sky  is  secured  by  looking  through 
the  negative  with  the  Jilm  side  away,  when  placed  on  the  engine  film  side  up  and 
measured,  requires  corrections  as  follows : 

The  X-measures  are  to  be  corrected  by  +  Y  sin  I. 

The  Y-measures  are  to  be  multiplied  by  cos  I,  where  I  is  the  defect  of  inclination 

(II'  30"). 

The  division-errors  of  the  circle  have  not  been  determined,  so  far  as  I  know,  but  are 
doubtless  small.  In  determining  the  inclination  of  the  sHdes,  different  parts  of  the  circle 
were  used  to  eliminate  any  such  errors.     No  noticeable  errors  were  found,  however. 

/ 


\ 


A  S^oJU 


APPENDIX 


97 


Table  of  Scale  A  of  the  L.  0.  Measuring-Engine  (Stackpole). 

The  table  gives  the  distance  from  o  division  to  any  division-mark  on  the  scale  at  i6°.67  C. 
Let  Sn  be  any  such  distance  at  i6°.8  C.  and  St  be  the  same  distance  at  /  degrees. 

5«=5o  (i  +  o.ooooo8(<-i6"'.8)) 


Scale. 

Inch. 

Scale. 

Inch. 

Scale. 

Inch. 

Scale. 

Inch. 

Scale, 

Inch. 

Scale. 

Inch. 

o 

0.00000 

SI 

1.01941 

101 

2.01847 

151 

3-01741 

201 

4.01636 

251 

5^01545 

I 

.01995 

52 

•03938 

102 

.03846 

152 

■03741 

202 

•03638 

252 

■03543 

3 

•03994 

53 

•05934 

103 

.05844 

153 

■05741 

203 

■05641 

253 

■05542 

3 

•OS997 

54 

.07928 

104 

•07845 

1 54 

■07737 

204 

.07641 

254 

■07541 

4 

•07997 

55 

.09926 

105 

.09845 

155 

.09732 

205 

■09643 

255 

■09540 

S 

.09998 

56 

.11924 

106 

.11843 

156 

.11728 

206 

.11640 

256 

■IIS37 

6 

.11994 

57 

.13918 

107 

•13839 

157 

•13724 

207 

■13639 

257 

•13534 

7 

.13992 

58 

•15919 

108 

.15838 

158 

•15725 

208 

.15641 

258 

•15531 

8 

•15991 

59 

•1791S 

109 

•17835 

159 

.17724 

209 

■17637 

259 

•17532 

9 

.17989 

60 

1.19916 

110 

2.19836 

160 

3^i9723 

210 

4.19639 

260 

5-19532 

lO 

0.19988 

II 

0.21991 

61 

1.21918 

III 

2.21831 

161 

3^21715 

211 

4.21632 

261 

5-21531 

12 

•2399s 

62 

.23918 

112 

•23825 

162 

■23713 

212 

.23628 

262 

•23530 

13 

•2S999 

63 

•25917 

"3 

•  25827 

163 

.25711 

213 

.25623 

263 

•  25528 

14 

.27996 

64 

.27912 

114 

.27823 

164 

■27713 

214 

.27619 

264 

.27526 

IS 

.29990 

65 

.29912 

"S 

.29818 

i6s 

■29713 

215 

.29619 

26s 

•29523 

i6 

•31988 

66 

.31911 

116 

•31813 

166 

.31712 

216 

.31617 

266 

•31519 

17 

•33987 

67 

•33910 

117 

•33812 

167 

■33705 

217 

■33615 

267 

•33516 

i8 

•35984 

68 

•35908 

118 

•35813 

168 

■35705 

218 

•35617 

268 

•35515 

19 

•37981 

69 

•37904 

119 

.37810 

169 

■37704 

219 

.37610 

269 

•37512 

20 

0.39978 

70 

'•39905 

120 

2.39805 

170 

3-39704 

220 

4.39606 

270 

5-39513 

21 

0.41980 

71 

1.41903 

121 

2.41801 

171 

3.41699 

221 

441603 

271 

5-41512 

32 

•43978 

72 

•43898 

122 

.43800 

172 

•43702 

222 

.43600 

272 

•43514 

23 

•45977 

73 

.45899 

123 

■45790 

173 

■45701 

223 

•45596 

273 

•45510 

24 

•47979 

74 

•4789s 

124 

■47791 

174 

.47701 

224 

•47596 

274 

.47506 

as 

.49976 

75 

.49888 

125 

.49788 

175 

■49695 

225 

•49593 

27s 

.49506 

26 

•S1974 

76 

.51888 

126 

■51784 

176 

.51694 

226 

•51593 

276 

•51507 

27 

•53973 

77 

•53887 

127 

■53782 

177 

-53692 

227 

•53587 

277 

•53504 

28 

•SS97S 

78 

•55888 

128 

•55780 

178 

■55691 

228 

•SSS9I 

278 

•55509 

29 

•57973 

79 

•  57887 

129 

■57778 

179 

■57693 

229 

■57585 

279 

•57SIO 

3° 

0.59969 

80 

1.59882 

130 

2^59777 

180 

359689 

230 

4-59581 

280 

5^59512 

31 

0.61968 

81 

1.61881 

131 

2.61775 

181 

3.61690 

231 

4-61583 

281 

5-61515 

32 

.63964 

82 

.63878 

132 

■63774 

182 

.63688 

232 

■63580 

282 

•63517 

33 

.65962 

83 

.65878 

133 

■65774 

183 

.65690 

233 

■65576 

283 

•65515 

34 

•67959 

84 

.67877 

134 

.67772 

184 

.67689 

234 

.67570 

284 

•67514 

3S 

•6995s 

85 

.69879 

135 

.69767 

i8s 

.69683 

23s 

■69571 

285 

.69521 

36 

•71958 

86 

•71875 

136 

■71763 

186 

.71682 

236 

.71568 

286 

•71519 

37 

•73956 

87 

•73876 

137 

■73758 

187 

■73677 

237 

■73568 

287 

•73520 

38 

•75955 

88 

•75872 

138 

■7S7S7 

188 

■75673 

238 

■75568 

288 

•75519 

39 

•77956 

89 

■77867 

139 

■77757 

189 

.77669 

239 

■77568 

289 

•77514 

40 

0.79951 

90 

1.79867 

140 

2.79756 

190 

3.79668 

240 

4-79570 

290 

579514 

41 

0.81952 

91 

1.81867 

141 

2.81756 

191 

3.81665 

241 

4.81564 

291 

5.81516 

42 

•83948 

92 

.83862 

142 

•83754 

192 

.83664 

242 

-83564 

292 

■83517 

43 

.85946 

93 

.85863 

143 

•85752 

193 

.85658 

243 

-85558 

293 

•85517 

44 

.87947 

94 

•87859 

144 

■87750 

194 

.87656 

244 

•87562 

294 

•87523 

4S 

•89947 

95 

.89861 

145 

■89745 

19s 

.89654 

24s 

■89558 

295 

.89524 

46 

.91947 

96 

.91858 

146 

■91745 

1 96 

.91652 

246 

■91553 

296 

.91520 

47 

.93948 

97 

•93854 

147 

•93741 

197 

•93647 

247 

•93551 

297 

•93517 

48 

•95946 

98 

•95854 

148 

■95739 

198 

■95644 

248 

•95549 

298 

•95518 

49 

.97944 

99 

•97851 

149 

■97739 

199 

■97645 

249 

•97552 

299 

•97516 

SO 

0.99943 

100 

1.99848 

ISO 

2.99741 

200 

3.99641 

250 

499S47 

300 

$•99515 

±     I 

±     3 

±     3 

±     4 

±      5 

±      5 

qS  determination  of  the  solar  parallax 

Table  of  Scale  B  of  the  L.  O.  Measuring-Engine  (Stackpole)  —  Continued. 


SCAIE. 

Inch. 

Scale. 

Inch. 

Scale. 

Inch. 

Scale. 

Inch. 

lOO 

2.00000 

141 

2.82053 

181 

3.62124 

221 

4.42187 

lOI 

.02007 

142 

.84063 

182 

.64124 

222 

■44193 

I02 

.04006 

143 

.86064 

183 

.66127 

223 

.46196 

103 

.06006 

144 

.88064 

184 

.68130 

224 

.48202 

104 

.08007 

14s 

.90070 

185 

.70129 

225 

■5020s 

loS 

.10009 

146 

.92069 

i86 

.72127 

226 

■52205 

106 

.12014 

147 

•9407  s 

187 

■74133 

227 

■54202 

107 

.14016 

148 

.96074 

188 

•76133 

228 

.56203 

108 

.16019 

149 

.98071 

189 

•78137 

229 

.58208 

109 

.18021 

ISO 

3.00078 

190 

3.80136 

230 

4.60208 

no 

2.20022 

III 

2.22022 

iSi 

3.02071 

191 

3.82140 

231 

4.62209 

112 

.24020 

IS2 

.04081 

192 

.84141 

232 

.64212 

"3 

.26024 

^53 

.06082 

193 

.86146 

233 

.66215 

114 

.28031 

IS4 

.08080 

194 

.88150 

234 

.68214 

"S 

.30028 

^SS 

.10085 

19s 

.90145 

23s 

.70212 

116 

•32036 

156 

.12085 

196 

.92146 

236 

.72217 

117 

■34036 

IS7 

.14095 

197 

.94146 

237 

.74222 

118 

•3603s 

158 

•16093 

198 

.96149 

238 

.76221 

119 

•38039 

IS9 

.18091 

"99 

.98158 

239 

.78228 

120 

2.40037 

160 

3.20097 

200 

4.00155 

240 

4.80232 

121 

2.42036 

161 

3.22095 

201 

4^02157 

241 

4-82235 

122 

■44041 

162 

.24102 

202 

.04165 

242 

.84236 

123 

..;■  042 

163 

.26099 

203 

.06170 

243 

■86237 

124 

•48043 

164 

.28099 

204 

.08172 

244 

.88239 

125 

.50042 

i6s 

.30100 

205 

.10174 

24s 

.90238 

126 

•52037 

166 

.32101 

206 

.12169 

246 

■92237 

127 

.54046 

167 

•34105 

207 

.14174 

247 

■94239 

128 

.56048 

168 

.36107 

208 

.16174 

248 

.96234 

129 

.58048 

169 

.38105 

209 

.18176 

249 

.98239 

130 

2.60049 

170 

3^40ii3 

3IO 

4.20176 

250 

5.00238 

131 

2.62051 

171 

3^42ii6 

211 

4.22177 

251 

5.02242 

132 

.64056 

172 

.44123 

212 

•2417s 

252 

■04251 

133 

.66050 

173 

.46120 

213 

.26172 

253 

.06256 

134 

.68050 

174 

.48120 

214 

.28179 

254 

■08254 

13s 

•700SS 

17s 

.50122 

215 

.30180 

25s 

.10256 

136 

•72056 

176 

.52120 

216 

•32179 

256 

.12258 

137 

•74059 

177 

■54127 

217 

.34180 

257 

.14263 

138 

.76061 

178 

.56120 

218 

•36185 

258 

.16264 

139 

.78063 

179 

•58123 

219 

.38190 

259 

.18265 

140 

2.80060 

180 

3.601 18 

220 

4.40191 

260 

5.20261 

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